ITA. I think Midori's FS at the 1990 worlds could've won the 1994, 1998, 2002, and maybe 2006 Olympic ladies competitions.
See, this is the benefit of a thread like this being revived periodically. Someone always chimes in with information about one or more other skaters, and then the game's afoot. Midori is not my favorite skater, but my admiration for her is boundless nonetheless. I think she probably would defeat some of the less proficient men. Also, despite her sheer power, she is very musical and has expression. Seventh? Not on your life.
Also, as someone pointed out, Tara's jumps were small. Someone once said that she jumped like a roller skater, which is what she started out as competitively. (My late friend Kath, figure skater fan extraordinaire, once remarked that you couldn't slide a piece of paper under one of Tara's jumps.) So I wouldn't put Midori, one of history's great jumpers, below Tara. The fact that Tara won the Olympics and Midori didn't isn't relevant if you're evaluating across eras on the basis of individual skills and quality. Tara's artistry doesn't exceed Midori's enough to push her ahead of Midori.
Kristi is another matter. She's a strong all-round skater with good jumps and equally good expressiveness. Also, she maintained her skills through a long profesisonal career, not that this is relevant to such a ranking. She has the OGM and won it with a triple-triple. She also competed (and very successfully) as a pairs skater. For her versatility alone, I'd rank her high on the list.
As for whether I'd put Kristi above Michelle--sigh. I'm not the person to ask. Michelle's skating has such an effect on me. As K.T. Tunstall sings in "Suddenly I See,"
she holds you captivated on her palm. I can't argue her placement on this list one way or the other, any more than I can compare an entire list of Oscar-winning actresses to Greta Garbo, who never won an Oscar. You can argue the excellence of all of them, their power and technique and versatility, but when you are finished, there is still only one Garbo.