I always get roasted when I make anime recommendations, but here are some you might want to try if you haven't already:

• Ergo Proxy - Post-apocalyptic cyber-punk with dense philosophical themes. Can be confusing and open for interpretation, especially towards the end but it's one of my favorites.

• Ghost in the Shell - All of the pre-2016 ones are good, haven't watched the newer ones, but Stand Alone Complex is best IMHO.

• Parasyte -the maxim- - Very gory. This one starts off great but gradually changes in tone and feel so your taste may vary.

• Fate/Stay Night: Unlimited Blade Works - Honestly the only one of the Fate/Stay series I can recommend, but it is great as a stand-alone piece.

• Sword of the Stranger - Good samurai-era action movie with great animation and a strong main character.

• Baki the Grappler - I haven't watched it yet but the manga is nuts and it sounds right up your alley.

Here are some others that you might want to try, even though they don't exactly fit your criteria:

• Tengen Toppa Gurren Lagann - When you said "masculine" the first thing I thought of was one of the side characters from this anime. May not be to your taste as it's a mecha anime, but it's definitely a wild ride.

• Grimgar - Ashes and Illusions - Again, not exactly hyper-masculine as it's about a bunch of teenagers, but it's a very grounded and realistic take on the Isekai genre.

• World Trigger - Shonen-style battle anime about mostly teenagers training to fight invaders from another dimension, but the characters are unusually mature and the fights are more cerebral than flashy, which I appreciate.

• Demon Slayer - Another one about teenagers (as is most common) but dark and bloody compared to many other shonen. Also gorgeously animated.

Also, Tokyo Ghoul and Psycho Pass are both often mentioned as popular dark, gory and mature series but I'm personally not a huge fan of either of them. Still, you may want to give them a try.

I always get roasted when I make anime recommendations, but here are some you might want to try if you haven't already:

• Ergo Proxy - Post-apocalyptic cyber-punk with dense philosophical themes. Can be confusing and open for interpretation, especially towards the end but it's one of my favorites.

• Ghost in the Shell - All of the pre-2016 ones are good, haven't watched the newer ones, but Stand Alone Complex is best IMHO.

• Parasyte -the maxim- - Very gory. This one starts off great but gradually changes in tone and feel so your taste may vary.

• Fate/Stay Night: Unlimited Blade Works - Honestly the only one of the Fate/Stay series I can recommend, but it is great as a stand-alone piece.

• Sword of the Stranger - Good samurai-era action movie with great animation and a strong main character.

• Baki the Grappler - I haven't watched it yet but the manga is nuts and it sounds right up your alley.

Here are some others that you might want to try, even though they don't exactly fit your criteria:

• Tengen Toppa Gurren Lagann - When you said "masculine" the first thing I thought of was one of the side characters from this anime. May not be to your taste as it's a mecha anime, but it's definitely a wild ride.

• Grimgar - Ashes and Illusions - Again, not exactly hyper-masculine as it's about a bunch of teenagers, but it's a very grounded and realistic take on the Isekai genre.

• World Trigger - Shonen-style battle anime about mostly teenagers training to fight invaders from another dimension, but the characters are unusually mature and the fights are more cerebral than flashy, which I appreciate.

• Demon Slayer - Another one about teenagers (as is most common) but dark and bloody compared to many other shonen. Also gorgeously animated.

Also, Tokyo Ghoul and Psycho Pass are both often mentioned as popular dark, gory and mature but I'm personally not a huge fan of either of them. Still, you may want to give them a try.

I always get roasted when I make anime recommendations, but here are some you might want to try if you haven't already:

• Ergo Proxy - Post-apocalyptic cyber-punk with dense philosophical themes. Can be confusing and open for interpretation, especially towards the end but it's one of my favorites.

• Ghost in the Shell - All of the pre-2016 ones are good, haven't watched the newer ones, but Stand Alone Complex is best IMHO.

• Parasyte -the maxim- - Very gory. This one starts off great but gradually changes in tone and feel so your taste may vary.

• Fate/Stay Night: Unlimited Blade Works - Honestly the only one of the Fate/Stay series I can recommend, but it is great as a stand-alone piece.

• Sword of the Stranger - Good samurai-era action movie with great animation and a strong main character.

• Baki the Grappler - I haven't watched it yet but the manga is nuts and it sounds right up your alley.

Here are some others that you might want to try, even though they don't exactly fit your criteria:

• Tengen Toppa Gurren Lagann - When you said "masculine" the first thing I thought of was one of the side characters from this anime. May not be to your taste as it's a mecha anime, but it's definitely a wild ride.

• Grimgar - Ashes and Illusions - Again, not exactly hyper-masculine as it's about a bunch of teenagers, but it's a very grounded and realistic take on the Isekai genre.

• World Trigger - Shonen-style battle anime about mostly teenagers training to fight invaders from another dimension, but the characters are unusually mature and the fights are more cerebral than flashy, which I appreciate.

• Demon Slayer - Another one about teenagers (as is most common) but dark and bloody compared to many other shonen. Also gorgeously animated.

Also, Tokyo Ghoul and Psycho Pass are both often mentioned as popular dark, gory and mature but I'm personally not a huge fan of either of them.