Don Luchessi in GFIII by far. First of all, his killer (who I think was supposed to be the guy who worked for Don Tomassino, who had been Michael's good bodyguard in GFI)gets shot BEFORE he rips off he glasses, breaks off a piece and jabs it into his jugular. Since Luchessi had bodyguards all around him. someone could have pulled the thing our of his neck and tried to save him, but as we see, no one bothered to try because in a later shot his blood soaked body is still at the desk with the glasses stuck in them. Where did Luchessi's body guards go?