His wiki says he follows moderate and modern interpretations of islam
so uh, is he a good guy or bad guy in the idea that he's going to go all theocrat
It's a bit more complex. He projects a really moderate image and he's not hardcore islamist for sure, but he's more about political control.
https://newrepublic.com/article/116044/fethullah-gulen-turkish-prime-minister-erdogans-biggest-rival