of the ones not mentioned, i would say Rikishi's Superfly Splash off the top of a cage onto Val Venis in their pay-per-view match.
just an incredible bump to take for such a big guy and great history with the whole Samoan Wrestling Family Tree thing. plus it looked cool.
also, Kurt Angle's Moonsault off the top of the cage onto Benoit... except that Benoit moved out of the way! that looked like it hurt a whole lot! totally awesome move!
honorable mentions that have already been mentioned:
Mick Foley's career: HIAC with Taker, I Quit with Rock, Street Fight and HIAC with Triple H, match with HBK, etc... too many to mention.
HBK: Barbershop incident with Jannetty, Montreal Screwjob, Jericho's heel turn and getting thrown thru the Jeri-Tron, ladder matches, HIAC, etc. also too many to mention.
Shane-o-Mac: his matches with Blackman, Angle, Show and Kane, though not all great clinics, all had some pretty amazing spots. falling from very high places most often, but yeah, also the belly-to-belly suplexes thru the glass walls was pretty crazy! definite "don't try this at home" moments.
Beer Bath and Milk Bath. both were epic in their own way.
any death... always tragic, no matter the circumstances. Rest In Peace.