Not as classic as others have listed, but I really enjoyed WeaponHex.
Over the years its ccome back so maybe it doesnt count? But really, for whatever reason I have digged this a lot:
OUtside that I really emjoyed "hulk the end" as well as there was a Hulk one-shot after he died that I'm blanking on the title of. For some reason, Hulk and end of existence stuff really go well together.