Freddie, Bon, Ozzy, David Lee Roth, Steven Tyler etc. All legendary frontmen. I’m going to stick my neck out and guess some of them aren’t/weren’t the easiest people to deal with, and not great at conforming without putting their own stamp on it and their own ideas.
To many people a frontman is the visible face, voice and mouthpiece of a band.
Pretty unlikely to have a band in which a strong front person doesn’t stamp their identity in some way, so pick a good one.