Not bad, Stadler. Here's my take, obviously written at the same time as yours:
Early Years
1969 Yes
1970 Time and a Word
Better than average late-60's stuff. More than pop, less than prog. Many hints of the greatness to come. Probably more for completists and/or folks who get into 70's Yes and want to know how it all started.
The Main Sequence
1971 The Yes Album
1972 Fragile
1972 Close to the Edge
1974 Tales from Topographic Oceans
1974 Relayer
1977 Going for the One
With the addition of Steve Howe on the third album and Rick Wakeman on the fourth, Yes was launched into the stratosphere. They didn't invent the side-long epic, but they took it to the next level with four on one album and six total across three consecutive albums. This is generally considered the prime of the band, and the prime of progressive rock in general by many.
Transition
1978 Tormato
1980 Drama
Tormato had the same lineup as most albums from the main sequence, but the band was running out of steam, the 70's and 70's prog were nearing the end of their heyday, and Yes was being pulled in different directions. It was an unfocused album of mostly shorter songs, and while it has its supporters, it is generally regarded as one of Yes' lesser works. Jon Anderson and Rick Wakeman both left after Tormato, opening the door for The Buggles to join for Drama, considered a step up by most Yesfans, but people hung up on Jon Anderson don't seem to like it.
The Rabin Era
1983 90125
1987 Big Generator
1994 Talk
A very different band, originally Cinema and started by Trevor Rabin, but became Yes under studio pressure to capitalize on the name. Much better than average pop, and still hints of prog, this is the most commerically successful lineup, but generally considered inferior artistically to the 70's works.
Sidesteps
1989 Anderson Bruford Wakeman Howe
1991 Union
Jon Anderson formed Anderson, Bruford, Wakeman & Howe because he wasn't really getting off on RabinYes. ABWH is a return to (Yes) form, and Yesfans argue endlessly about whether or not it's a Yes album. When ABWH went to make their second album, the group was already splintering and they had trouble coming up with enough material, so some suit came up with the idea to add some leftover RabinYes tunes and promote it as the Union of the two Yesfactions. They fooled almost no one, but the album isn't bad. On the downside, both Yes and ABWH finished self-destructing before it was done, leaving Jon Anderson and producer Jonathan Elias to try to finish the album. With no one available for overdubs, half the studio musicians in California have "additional musician" credits on this album. It still isn't bad; you just never know who you're listening to.
Return of the Classic Lineup
1996 Keys to Ascension
1997 Keys to Ascension 2
Two double CDs, each with both studio and live material. There's actually only a single CD worth of studio material total, but it's pretty good and there are two new epics. The studio tracks are also repackaged as Keysstudio, a weird name that makes no sense if you don't know the history, but most of Yes doesn't make sense anyway. The live tracks came from a three-night reunion show, but are heavily overdubbed.
Everything Since
1997 Open Your Eyes
1999 The Ladder
2001 Magnification
2011 Fly From Here
2014 Heaven & Earth
Yes changed members so much that there are rarely two albums in a row with the same lineup, and never more than two. In 1997, the "classic" lineup had already broken up again before Keys to Ascension 2 came out, and Open Your Eyes, the new album from the next lineup, came out only weeks later. Since then, the lineup has continued to fluctuate, with founding member and primary lead vocalist Jon Anderson leaving after 2001's Magnification. This isn't really an "era" as such, and the quality varies wildly from album to album, and even from song to song.