Katsidis had already been in a ton of wars leading into the JMM fight so I wouldn't consider the JMM fight being the sole reason for "losing it"
well most people didnt think bowe was shot as he was a huge favorite(esb link says golota+700)but he definately wasnt "shot" going into the fight prior with holyfield as he was a 3-1 favorite against evander who had just beat a still prime mercer. http://www.boxingforum24.com/showthread.php?t=14082
I would say Peter vs Vitali Mormeck vs Oneil Bell II Haye vs Mormeck and even Macrinelli Wlad Klitschko and Calvin Brock Lennox Lewis vs Hasim Rahman II, I know he wound up getting the WBC again but he was never able to regain what he won in the first Lewis fight Manny Pacquiao vs David Diaz Potentially Randal Baily vs Mike Jones Antonio Margarito vs Kermit Cintron II
B-Hop / jermaine Taylor Cotto / Margarito 1 Margarito / Pacquiao PW / Sergio 1 Mayorga / Forest (Rip) Chavez / Taylor Oscar / Quartey JMM / Diaz