Master Roshi maybe an old perv, but acquired a lot from his years of fighting.
From bulking up with Hulk-like muscles and holding his own against multiple opponents in the Tournament of power, this old coot even invented the trademark Kamehameha technique.
The man who taught Goku and Krillen nearly everything about fighting needs to be on this list. There's no excuse for him not being in the roster. Could we see him this year?