Bowers was productive and great. But it's hard for a 6'4", 230 lb TE to be considered a physical freak. I think we're leaning on great players and not solely physical freaks.
I'm thinking guys you see on a roster who's height/weight/position stand out, but maybe he never even plays much.
I name recognizable guys to give you an idea of what a "freak" might be.
Joe Milton would be a good example at QB.
He could Uncle Rico it over 'that mountain,' but was never an elite productive talent. I think he started maybe 1 season overall?
That one UM QB comes to mind - Drew Henson. Great, special talent.....but his career mimicked Cade McNamara's in terms of stats.
Sticking with UM, just because we're all familiar with them, a Tyrone Wheatley would be a freak - that size of a RB returning kicks and such.
Guys like that, who may or may not have been productive, but would dominate an NFL combine-type situation.