The Moravec linked to by AG is the earlier set, done for Connoisseur. I've been insisting forever that the later one, on Supraphon, is preferable. I find the former overly nuanced but love the latter, which has plenty of bite. Can certainly understand the attraction of the other, though.
Some of Cortot's set from ca. 1942 are preferable to the earlier counterparts, for me, although as a whole it's less satisfactory. I agree that Fiorentino is far below his best here. Like the Etudes and Waltzes he recorded (quickly) at the same time, it seems a bit dashed off -- although I think the outcome in the Waltzes is terrific.
Gilels, released somewhat mysteriously for the first time in 1990 -- as an LP, is something I transferred about 15 years ago. Objectivity is probably part of his plan, but I think it's more a matter of a hardness, toughness of emotion. It's severe not so much due to detachment as to a kind of passion. Notably, it's a live performance -- from about 1953.
An interesting thing about the wonderful Zhukov performance is that the sound is richer and the account that much more effective via the original vinyl issue.
Sofronitsky -- there's a full set, but in addition there's a set something like 22 or 23 Preludes. Undoubtedly accounted for in discographies posted here recently. Very interesting and wonderful performances, for sure -- but I find them a bit more outré than necessary. His Op 45 is fabulous.
SE.