I'll second Tsukimichi, it is one of my favorites so far, to the point that I started reading the web novel to see further into the story. I'm a big fan of the world and the way the story plays out.

Overlord like lapalapa mentioned to me is absolutely top tier for the OP characters, cool setting, and villain (or at least not good guy) perspective as well as some humor. Also own/started reading the novels for this one.

One thing like some others have mentioned is that this genre is super played out, the popularity started to boom with novels in Japan, talking like dime a dozen novels, online stuff written by kids, and has really grown out of control. So there are probably thousands of Isekai series at this point, and the vast majority are garbage. Personally I like the trope though, when I was younger I used to fantasize about waking up in the Pokemon world, or the world of FFXI and what I would do there myself, so it appeals to me more than it should.