It’s not only that they follow each other on the album, but that most of them are segued together, or at least are separated by only the briefest of pauses (as in “Heartbreaker”/Living Loving Maid"). Oh, and the Yes one, like the Guess Who example, is really a single song with two parts.
First Day of School (Technically an intro)/ When Will They Shoot? - Ice Cube
I’m Not Sayin’/Ribbon of Darkness - Gordon Lightfoot
For Lovin’ Me/Did She Mention My Name? -Gordon Lightfoot
“Pro Victoria” / “Sentinel” - VNV Nation
I would have said the Yes example (“Your Move”/“I’ve Seen All Good People”) is more like “Heartbreaker”/Living Loving Maid", except that “All Good People” appears both before and after “Your Move”.
Another example of two blended songs (like “No Sugar Tonight”/“New Mother Nature”) is Simon and Garfunkel’s “Scarborough Fair/Canticle”.
And in the category of songs segueing into one another, there’s “Help on the Way”/“Slipknot!”/“Franklin’s Tower” by Grateful Dead. (The Dead are so famous for doing segues in concert that their fans have developed their own punctuation for denoting this – instead of the forward slash, they separate the songs with arrows, i.e., “Help on the Way” –> “Slipknot!” –> “Franklin’s Tower”.)
I’m not sure if it was ever released to the public, but I can remember hearing Depeche Mode Route 66 and Drive being mixed together. I’ve heard the songs presented back to back, not mixed, a few times.
Another from Yes: Long Distance Runaround/The Fish (Schindleria Praematurus)
:fist bump: 
The overall song is titled “I’ve Seen All Good People” with the two sections listed as:
a. Your Move
b. All Good People
“Starship Trooper” from the same album is also divided into subtitled sections, three this time. The band actually had a very practical reason to assign these extra titles, as they got more royalties that way. (The early King Crimson albums pulled the same stunt, listing songs as “including” some other title, like “21st Century Schizoid Man (including Mirrors).” These prog-rock bands’ songs were so long, and consequently there were so few songs per album, that if they gave them only one title each they wouldn’t get a full allotment of the available royalties.)
“Switch into Glide/Beat Goes On” - The Kings
“The launch/Cool the Engines” - Boston
I’ve been led to believe the musical term for this is “rhapsody,” and it certainly has plenty of artistic street cred.
Two operas:
Cavalleria Rusticana and Pagliacci.
Def Leppard: “Bringing on the Heartbreaks” and “Switch 625”
We have Pandora on Roku and every once in a while it will play “Carry That Weight” without “Golden Slumbers” or “The End.” It just stops! Sounds weird. 
Ziggy Stardust/Suffragette City