I think Roshi and Ero-Sennin top them haha xdThere's also Kakashi and Sanji xd
But I say Roshi
Yep, I was just going to say that his reason for being a perv was research, while Roshi will go around Grabing girls' azzes, rub his face in their tits. He reads porn magazines every day, and I've watched DBZ and Naruto a lot to know that. Roshi freakin nose bleeds when he looks a beautiful women. Now Jiraiya's pretty pervy too, but not like Roshi.Jiraiya does it for research, Roshi does it out of loneliness xd