That would really embarass their opponents. You wouldn't want your name tacked on a 900 rated CC player to give the idea that you are a bigger loser than they are.
TOP 10 LIST OF DEFEATED OPPONENTS

ha that's ridiculous. if you lose to someone, it is classed as a win to them and you can't take that away. everyones biggest win is displayed. it is just an extension to that... it creates an extra aspect to see when judging your opponent. one guy could be rated 900 and then beat someone rated 1600 on time, for some non chess reason. that does not reflect skill level. 10 gives a better picture!

ha that's ridiculous. if you lose to someone, it is classed as a win to them and you can't take that away. everyones biggest win is displayed. it is just an extension to that... it creates an extra aspect to see when judging your opponent. one guy could be rated 900 and then beat someone rated 1600 on time, for some non chess reason. that does not reflect skill level. 10 gives a better picture!
if it's 900 level enthusiasts playing bullet or blitz, it's more probably than not a "non-chess reason".

Giving such a list without mentioning if you won in blitz or if you won by opponent withdrawing or you won vs an opponent doing a simul or whatever the circumstances are makes little sense and would be misleading.

I agree with the OP that this would be a nice feature. Perhaps it could be added to the Premium features though?
While explaining which category the win came in would be nice, it's not necessary. Perhaps a 10 ten list of victories in each time control would be better, just as the highest rated player defeated is currently shown in each time control.
I'm sure not one chess.com user would argue with the inclusion of a TOP 10 WINS section in the stats page.... and how simple would it be, and how satisfying?