STEVE YORK
(detailed list of sessions) 
This is the list of the sessions I know Steve York appears... I've classified them into several categories:
Sessions with former/current bandmates:
Graham Bond A great keyboardist and sax player, a pity he died back in 1974. This album features great players: his wife Diane Stewart on vocals, plus John Moorshead (guitar), Kevin Stacey (guitar), Steve York (bass), Alex Dmochovski (bass), Ric Grech (bass), John Gross (sax), Jerry Salisbury (harmonica), Keith Bailey (drums), Pete Bailey (percussion), Godfrey McLean (drums), Aliki Ashman (vocals), Annette Brox (vocals), Victor Brox (vocals). 
Dr. John A great artist and performer. Born Mac Rebennack, he has always had the respect of the musicians. This album includes guest collaborations from the complete Eric Clapton band these days, Derek & The Dominos: Eric Clapton (guitar), the late Carl Radle (bass), Bobby Whitlock (keyboards) and Jim Gordon (drums). Plus Mick Jagger (vocals), Graham Bond (sax), Ronnie Barron (keyboards), Steve York (bass), Jesse Boyce (bass), Victor Brox (keyboards), Calvin 'Fuzzy' Samuels (bass), Wayne Jackson (horns), Chris Mercer (sax), Jerome Jumonville (sax), Bobby Keys (sax), etc. Backing vocals by Doris Troy, P.P. Arnold and Shirley Goodman. 
Arthur Brown He's the famous singer and showman of the Crazy World of Arthur Brown (the one from 'Fire' fame). Gladly, he's still around... This album from 1974 features some of his old bandmates, such as drummer Drachen Teaker, plus Andy Dalby (guitar), Steve York (bass), George Khan (sax), Pete Solley (keyboards), Keith Tippett (keyboards), Charlie Charles (drums), Charles Dunbar (drums), and backing vocals by Stevie Lange and Mutt Lange, among others. 
Robert Palmer Robert Palmer was one of the lead singers in Dada and Vinegar Joe. Steve York appears uncredited on Sneakin' Sally through the alley, playing harmonica in the title track.

In Pressure drop, Robert Palmer is backed by the whole lineup of Little Feat (the great Lowell George on guitar, Paul Barrere on guitar, Kenny Gradney on bass, Bill Payne on keyboards, Richie Hayward on drums, Sam Clayton on percussion), plus James Jamerson (bass), Jean Roussel (keyboards), Mel Collins (sax), Steve York (harmonica), Mongezi Feza (trumpet), Ray Allen (sax), Martyn Frye (tuba), Ed Greene (drums), horns by Muscle Shoals, and backing vocals by Joe Brown and Vicki Brown. 

Elkie Brooks Great album by this fantastic singer. With some of his old mates in Vinegar Joe: Pete Gage (guitar), Steve York (bass), plus Isaac Guillory (guitar), Jean Roussel (keyboards), Ronnie Eades (sax), Trevor Morais (drums), Morris Pert (percussion), and backing vocals by Marcy Levy, Carla Benson, Jimmy Chambers, George Chandler. 
Sam Mitchell Steve York plays in this album by guitarist Sam Mitchell. I don't have more info, as I don't own the album. 
Other sessions:
Joan Armatrading A great artist, I love her albums. Back to the night was produced by Pete Gage, so he brought Steve York with him (playing bass and harmonica). Also featured: Bernie Holland (guitar), Colin Pincott (guitar), Andy Summers (guitar), Steve York (bass, harmonica), Phil Chen (bass), Ron Matheson (bass), Jean Roussel (keyboards), Dave Brooks (sax), Tony Newman (drums), Tony Carr (drums), Gerry Conway (drums), John Halsey (drums), Chris Karan (percussion), Gaspar Lawal (percussion). 
Charlie Musselwhite This album by this bluesman singer, guitarist and harmonicist features Stefan Grossman (guitar, also producer), Sam Mitchell (guitar), Steve York (bass), Bob Hall (keyboards), Jeff Rich (drums). 
Raphael Ravenscroft A superb sax player. He has played in albums by many people, such as Gerry Rafferty, Andrew Matheson, Alvin Lee, Chris Rea, Bonnie Tyler, Marvin Gaye, Brand X, Robert Plant, Pink Floyd, Mike Oldfield as well as toured with Roger Waters. Lately, he has been guesting in Bob Tench band. Someday soon, he'll have his own page in my Olympus.

This was his solo album. Being a famous sessionman, it was clear that his solo album were to contain many of his companions. The list is amazingly long: Maggie Ryder (vocals, later in Brian May Band with Neil Murray and Cozy Powell), Dennis O'Brien (vocals), Nigel Jenkins (guitar), Gary Taylor (bass), Steve York (bass), Kuma Harada (bass), Pete Zorn (bass), Tommy Eyre (keyboards), Pete Solley (keyboards), Stretch (drums), Geoff Britton (drums, ex-Wings and Rough Diamond), Liam Genockey (drums), Preston Heyman (drums, later with Brand X, Randy California, he even played with Atomic Rooster), Frank Ricotti (percussion), and many others.