Tbf, not only was Arminius from a wholly different period 300 years before the great barbarian migrations, but he wasn't quite an immigrant or an immigrant's descendant like Stilicho & Aetius. Just the prince of a pro-Roman tribe who took Roman money & fought with them long enough to learn all their tricks. His victory at Teutoburg overshadows him later getting his ass beat into the ground by Germanicus (which is why the Romans had provinces called 'Germania' into the 5th century, some emperors even made Trier their capital from time to time - most famously Constantine the Great), and most of his own family fought against him. His tribe, the Cherusci, became tame under his nephew, a dude so pro-Roman that he was literally named Italicus.

I would liken Arminius to basically a Germanic Osama bin Laden, really. Petty royalty who was on the payroll of a more civilized great power to fight other savages; came to despise said great power that he turned against it in dramatic fashion; was opposed by his own kindred; eventually got rekt by the aforementioned great power; and yet that great power can at best only maintain an indirect hold over his homeland through puppet regimes rather than directly conquering it.