Come Taste The Band is a great album.I'm gonna go with Tommy Bolin
Lennie Breau
Pete Willis
High and Dry is my favorite Def Leppard album... and they were on a rising rocket ship... but Pete's struggle with the bottle left him on planet Earth and he got replaced by Phil Collen who is realistically the superior guitar player. When you're in a Gold->Platinum selling band, that's a shit time to become a foot note.
Both of their original guitar players could not get past the bottle. At least Willis is still alive.
Being murdered didn’t help.
But yeah. LA and addiction has always been an especially nasty combo.