The only one i can think of is Jon Jones and it has nothing to do with his fighting, but all to do with when he started doing the holier than though/god squadding bullshit. Then he ended up showing how much of a hypocrite he was.
I don't jump off bandwagons because a fighter i like loses. I also don't get sucked in to hype, because so many fighters get hyped up and end up being mediocre. People on this forum love whoever is the current "cool guy" to follow. Mike "probably didn't even finish the 3rd grade" Perry is a perfect example.