Just off the top of my well abused & old as dirt brain I recall:Pink Floyd,Led Zeppelin,The Scorpions,White Snake,UFO,ELO,EL&P,The Beatles,The Beach Boys,Deep Purple,Queen,Metallica,Alan Parsons Project,Supertramp,Kansas,Jethro Tull,Rush & Stevie Nicks all using full orchestras at one time or another...I'm sure just about EVERY decent rock band did this as well...
Orchestrated Rock...Uriah Heep and others
https://www.youtube.com/watch?v=zau-okpFssg
Released in 1971 Salisbury by Uriah Heep was always one of my favorite Prog Rock albums and groups.
I recently re-listened to the re-mastered title track on my high end system for the first time. Kind of blew my mind. 16 minutes long.
I concluded that I’ve always enjoyed orchestrated rock, which probalby started with Neal Young’s Harvest.
Any suggestions of other classic rock groups that used orchestration would be appreciated.