Hey, I'm looking for the highest quality recordings from the following Artists:

Eva Cassidy most certainly did cut at least one LP. I own a copy but can’t tell you the title because I’m away on vacation. As for Chet Baker, look for him on any West Coast jazz album, e.g., Riverside, or with Mulligan, Konitz, Pepper, etc. I personally don’t care for his singing. You’ve gotta develop these tastes for yourself. None of us can tell you what albums by what performers you will like best. 

Eva Cassidy is easy, the 2 CD Nightbird(or the 1 CD version) recorded live at Blues Alley. Easily the most natural(live recording) and dynamic(lack of compression) of all her recordings. And because of that it captures her unique, exciting approach to her renditions. Crazy that she thought it was a poor recording and she didn't want to put it out publicly at first. The world would have been cheated of a spectacular performance.

If i was looking for the best quality on vinyl, The Japanese pressings is what i would be looking for. 

There is a 4 LP release of Eva Cassidy’s Nightbird and it is spectacular. It was out of print for a while but it recently got reissued and should be attainable. 

@arcticdeth Love it!