tbh we can talk about some of these fights.
Leben: exciting fighter but always limited and with no other skills than durability and chin, a fight booked to make Silva shine against a perfectly suited opponent
Lutter: a fight in which he pulled off a finish but a fight that he was losing
Henderson: he lost the first round decisively, then he pulled out another finish
Irvin: a "circus "fight between a huge MW and a really mediocre fighter that couldn't cut anymore
Griffin: while way better than Irvin we are talking about a fighter never considered really "elite", his heart and his TUF participation were the reasons of his popularity (and his "win" against Rampage is still debatable, while i think judges scored correctly as i can remember)
Sonnen: first fight was almost embarrassing, the second one started same way before Sonnen went full retard (on top of that i still think Sonnen talked his way to the ts)
Bonnar: like Griffin, he was evenpretty much retired att, never been a A grade fighter, even at his peak before TUF
GSP may be "boring" but his only fight in which he looked like he cannot impose his will was the last defense against Hendrix, a huge WW who literally fell in a downward spiral after USADA and that embarrassed himself with the talk about steroid and the WADA stuff before the fight.
On top of that i cannot remember an undeserved contender for GSP, Diaz apart, even Hardy - who was nowhere near a legit ts - was the best fighter available between the ones GSP had not already beaten.