The Duke Jordan, Horace Parlan and Kenny Drew are all very nice, though I wouldn't necessarily call them "essential".
The Dexter Gordon is a relatively recently dug up live recording with Kenny Drew and if you are a fan of Dex, it is essential.
I picked up the Brew Moore because I enjoy Kenny Drew and it is exceptionally good. Not a lot of recordings of his available, so its nice to see this again.
The Brew Moore is one of hell of a record. Highly recommended!
So are the Walt Dickerson...
I'm partial to the Lee Konitz at Juan (with Martial Solal) and the Chet Baker 'Someday My Prince Will Come', one of his best!