I haven't seen Halloween III yet and only saw the Rob Zombie films once each and have to see them again to see how they hold up for me. So for now I'll just rank the original series minus Season Of The Witch.
Halloween II (1981)
The Return Of Michael Myers
The Curse Of Michael Myers
The Revenge Of Michael Myers
Love 1, 2, 4 and H20, and even like 6 (I haven't seen the Producer's Cut, though). 5 is meh and Resurrection is an insult.