Sorry if I missed it but I did check the updates. "Get Back" by a group called Courtship, the b-side of a Capitol single #2862. I didn't find it on YouTube. It's a slightly slowed down take with vocals that remind me of Player or Ambrosia.
Another one that I didn't see: "The Long & Winding Road" by Mark Stein, UK single on Phil Spector International label, #2010 008. This one was actually issued twice. First issue was in 1975 with a Mark Stein original on the B-side and then in 1976 (using the same 2010 008 number) in a longer version. The beginning section was edited off on the first issue. The complete version makes more sense as the song was obviously meant to be presented in a more Vanilla Fudge-type arrangement. The B-side of the second release is Roberta Flack's "Killing Me Softly...."
The versions of YKMN(LUTN) by Abbey Road Players and The Revolver Road Band are one and the same. Four that you don't seem to have, and the albums they are taken from are: BossaCucaNova - A Tribute To The Beatles '69, Volume 1: Get Back - De Volta Aos Beatles Filthy Face - Not Really Dirty Paton James - Past Masters Volume Two Strangulated Beatoffs - The Beatoffs White Album All are on albums comprising entirely of Beatles covers, so there's a lot more there for you too
all added one addition leads to more never ending project Magickal Mystery Tour Help! Past Masters Volume Two Sgt. Pepper's Lonely Hearts Club Band Revolver
A cover of Come Together by British band Jason Crest is included on the album Jason Crest Radio Sessions 1968-9 . Limited edition & numbered . On the Tenth Planet label, released 1999 according to discogs discogs Could not find Come Together on youtube , so as The Beatles covered this, Jason Crest's version of You Really Got A Hold Of Me
