I assume it will still count if I had to drop a needle flip the album to listen to the second side.
I can't really put these in order with certainty but I'll guess:
1. Rush: Moving Pictures
2. Van Halen: Van Halen
3. Styx: Equinox
4. Kansas: Leftoverture
5. Rush: Exit Stage Left or SRV: Texas Flood.
Moving Pictures would probably be #1 anyway, but it far outpaces the others because in the 90s I bought it on CD and it wound up getting jammed in the player and for about 2 years it was my only choice while driving except the radio.
Some others from my younger days (pre-1978) before the proggers got me were Alice Cooper's Greatest Hits (from before he broke up the band), Billy Joel The Stranger, and an Elton John's Greatest Hits collection.