Schenker never had a better band, UFO never a better guitarist, simple as that.
That's Danny Peyronel on the keys, right, not Paul Raymond? Peyronel was more of a piano player than an organ or synth player and he gave UFO that poppy edge for the short while he was with them. To this day I think they peaked with No Heavy Petting rather than the Ron Nevison production jobs that followed even though those were still good. But Petting was both raw and refined, gutsy and elegant.
Schenker's career is a series of what ifs - he was considered as a replacement for Mick Taylor with the Stones but refused to audition for them in youthful ignorance, preferring to stay with UFO. He jammed with Aerosmith as a replacement for Joe Perry, but didn't like Tyler's then obvious drug addiction, he did demos with Billy Sheehan that went nowhere (since then released as bonus tracks on the first MSG album), he put down Ozzy's offer to join the Blizzard of Oz because the pay allegedly wasn't good enough and he was one of the players DP seriously considered when Blackmore went AWOL once again in 1993, but the band decided otherwise after some discreet inquiries on his state of mind and general reliability. We should really send him to the Ostfront for all the chances he has missed.