For me, the Big Three are Fokine, Balanchine and Ashton. Fokine is mostly on faith, I'll admit, for I've just seen shards of his work, but they're solid shards and I once read extensively about him. For me, these three are equal. There are some ballets that are better than others, but on balance, I think they're, all three, top of the line.
One a separate cloud, over to the side, are Tudor and Massine. Tudor, because he produced so little, in comparison, and, although he was associated with a company later in his career (unlike Fokine) he was fallow for a very long time. Of what I've seen of Massine, I think his craft is first-rate, but I just haven't seen enough.
The next level for me is Robbins, MacMillan, Cranko. I find all of them problematic, I think they've all produced some fine, and some less fine, work, but compared to their peers, not to mention successors, they're solid second-rank very good choreographers, in my book. I would put Grigorovich in here as well, although I haven't seen anything of his that I really like or admire, and I think much of his work is wrongheaded. Despite this, there is a craft and an artistry there.
There are some European choreographers whose work I haven't seen enough of to really judge. Some Bejart is good, some, I think, is absolute schlock, but that's based on less than a dozen ballets. Likewise with Roland Petit. Some of his ballets at least provide very good performance opportunities and are solidly constructed, others are often called "merely cabaret," and I think that's an insult to cabaret. I once admired the work of Hans Van Manen a lot, but have only seen about a dozen of his ballets, and I don't think he developed into a truly top of the line choreographer.
Of the other -ines, like Lichine, and choreographers like DeValois, Robert Helpmann, Andree Howard, I cannot speak.
Well, at least I'm brave



