Quentin never really got his due just like another great Smith sideman who was with him for many years and on many, many albums, Eddie McFadden. They both got chops, that is for sure, but I think Jimmy liked them for there ability to groove on the low register, through in some blistering licks here and there, and always keep that down home blues feel as a foil for his intense style.
Obviously these 2 are overshadowed by Jimmy's other session guitarist in the 50's and 60's, Kenny Burrell and Wes Montgomery. There playing is not as memorable as both these monster players, but still great nonetheless.
Here is a sample of Eddie and Jimmy in the 50's:
YouTube - 01.Soft Winds - Jimmy Smith Trio + Lou Donaldson