Moore's movies were the ones that first got me into Bond. His acting was good, but it was really the over-the-top villains and locations(freakin outer space!) that made me love those movies. It was Comic Book storytelling before movies were made from Comic Book characters.
Due to that, I would rate Moore higher then other people have, possibly anyway. I just think all the actors who played Bond did a real good job.
I probably would choose Connery as the best, however. He certainly was the one they kept coming back to. He was the more rugged one, with the more rugged accent to match. Most of the others were more suave sophisticates, who just happened to be cunning enough to win out in the end.