Jango's death was just as sucky, if not worse. How can you even say that about Boba and not about Jango? He gets off a couple shots and then he's dead. At least Boba's death was funny. Heck, Boba wasn't a major character in the OT until afterwards when he gained the fan following. And even Lucas has said that he doesn't consider him dead, or something to that effect. He was just tossed out of the battle.
The Executor: made perfect sense. Suicide ship crashes into the bridge and the ship gets screwed. I had no problem with this. Hell, look at how the At-Ats were taken down (and BOTH Death Stars for that matter). The destruction of all the major Imperial ships/vehicles/Death Stars were all kinda the same.