Yeesh, well this turned into a stomp for Shere Khan over Mufasa fairly quickly.
I guess the main problem here for Rumbles is that Mufasa, like Superman Prime 1 Million (golden god), looks great on presentation alone but has no actual usable feats.
And I doubt that Adult Simba has anything in his own extended animated history (LK1, LK2, LION GUARD tv show) that is even close to Khan's decisive fight with Baloo.
And if we're including style points, tell me something: when or where has either Mufasa or Simba looked at striking as Shere Khan does in TALESPIN:
No contest.
The tiger beats the lion.
Khan FTW.