
Here's a series that most of us are already very familiar with. Despite Jonathan Wolff having their bases pretty covered, Seinfeld did occasionally pick out the odd library track here and there from APM, FirstCom, and OGM.
Bruton
Hawaiian Farewell - George Elliott
Chappell
Anyone For Cha Cha Cha - Walter Stott
Like Basie - Malcolm Lockyer [not on UPM site]
Mayfair Quickstep - Eric Swan
My Baby's Foxtrot - Eric Swan
Scenes From the Twenties (B) - Sam Fonteyn
The Sliding Mr. Bones - Malcolm Lockyer
Soldiers In the Park - Cy Payne, Lionel Monckton
FirstCom Music
Backbeat Snap - Carl Strommen
Music House
West Side Blues - John Cameron
Ole Georg Music
Denza: Funiculi Funicula (Vocal) - Lee Ashley
Sonoton
Casta Diva Part 2 Act I Norma - Vincenzo Bellini
Vesti La Giubba Act I Canio - Ruggero Leoncavallo