I'm going to make a silly suggestion:
Yes - Anderson/Wakeman/Howe/Squire/White
This line-up yielded FOUR studio albums: Tales From Topographic Oceans, Going For The One, Tormato, and Keys To Ascension/Keystudio.
Sure, Tormato isn't ENTIRELY golden, but those four albums are pretty fantastic, and I'd say they're four of the band's BEST albums. I'd take those four over the Anderson/Rabin/Kaye/Squire/White line-up anyday.
Also, I'd say Genesis, if it was the Gabriel/Banks/Rutherford/Collins/Hackett line-up, which also yielded four studio albums: Nursery Cryme, Foxtrot, Selling England By The Pound, and The Lamb Lies Down On Broadway - all complete stellar albums.
I'd say line-up changes in a band allow specific sections of a discography to count to this because technically, the changes in the line-up make for a different band, especially in the cases of Yes and Genesis. If I also could include it, I'd add the Wetton-Era King Crimson Trilogy: Larks' Tongues In Aspic, Starless And Bible Black and Red.
-Marc.