Most people know about Legrand Jazz, but Plays Richard Rodgers is a real overlooked gem. Legrand uses an expanded big band with rhythm, saxes, and brass, along with a French Horn and woodwind section. Players include Clark Terry, Bob Brookmeyer, Urbie Green, Phil Woods, Paul Gonsalves, Milt Hinton, Gary Burton, and Tommy Flanagan or Hank Jones.
Superb arrangements with just that perfect amount of space-age sparkle. Great soling too. Comparable to the kind of stuff that Q or Oliver Nelson were doing at this time, but with a sound that is very Legrand.
Digitally, this is available on the Anthologie set, and also paired with Broadway is My Beat, which is more orchestral pop than jazz. On LP, this came out in the US as Philips PHM 200-074.
Highly recommended if you like this kind of stuff.