There's a lot to choose from, so bear with me...
In Mozart, it's important that the pianist be able to add ornament or improvise embellishments in a seamless, classical style.
Of those pianists that ornament well, I'd first mention Alicia de Larrocha (with conductor Sir Colin Davis & the ECO, who I prefer to Solti), but also Alfred Brendel (I'd probably go with Brendel's earlier K. 595 recording with Marriner, though the later Mackerras recording is good, too), Murray Perahia (especially his 2nd recording with the Chamber Orchestra of Europe, though I've never been altogether crazy about Perahia's conducting), Ingrid Haebler, and on a period fortepiano, Malcolm Bilson (with John Eliot Gardiner in top form). Those are my top recordings (along with the older recordings by Clara Haskil & Mieczyslaw Horszowski--see below). Although on another day, I might have substituted Zoltan Kocsis's K. 595 for Haebler's...
If none of those work for you, here's a reference list of my 11 other favorite Mozart pianists (I'm not sure if they've all done K. 595, but many have),
--Clara Haskil--Haskil is one of my favorite pianists, in general, and her K. 595 with conductor Ferenc Fricsay is masterful, & another one of my top choices:
--Dubravka Tomsic (--I don't think she's recorded K. 595, but I'm not certain of it)
--Maria Joao Pires
--Christian Zacharias (I slightly prefer his earlier EMI recordings to the MDG 'audiophile' ones)
--Jos Van Immerseel (on a fortepiano)
--Mieczyslaw Horszowski (historical mono recordings, but one of the greatest Mozart pianists I've heard in my life)
--Zoltan Kocsis, whose brilliantly played K. 595 is another favorite of mine, as noted:
Piano Concerto No. 27 in B-Flat Major, K. 595: I. Allegro
Piano Concerto No. 23 in A Major, K. 488: II. Adagio
Concerto No. 27 for piano and orchestra in B flat major K. 595: III. Allegro
--Geza Anda
--Rudolf Serkin (I prefer his earlier Columbia recordings to his later digital Mozart recordings on DG, with Claudio Abbado--since Serkin had gotten a little old by that time, and it can occasionally show in some of his faster movements, even though the slow movements are very beautifully played & for some will be worth the price)
--Andras Schiff (with Sandor Vegh in Salzburg)
--Matthias Kirschnereit
I also like Elizabeth Rich in Mozart, but I believe she only recorded the complete piano sonatas.
Finally, Emil Gilels is one of my favorite pianists, too, so you can't go too far wrong with his K. 595, which is highly regarded. However, his conductor, Karl Böhm tends to be too Brahmsian in Mozart, which is a style that Mozart wouldn't have recognized, nor had in mind when he composed this music, since it didn't exist yet. While Annie Fischer's Mozart playing is excellent, too, but Sawallisch's conducting and the orchestral playing is again too post romantic in style for the 18th century Mozart. Worst of all in this regard is Wilhelm Kempff with Ferdinand Leitner, where the music gets dragged:
Mozart: Piano Concerto No. 27 in B-Flat Major, K. 595 - III. Allegro.
So, I'd probably go with Gilels over Fischer, and Clifford Curzon with Benjamin Britten, as well (which won a rosette award from the old Penguin Guide, but it's never been a top favorite of mine). However, personally, I prefer Clara Haskil, Geza Anda, and Rudolf Serkin most among the oldies, and if you don't mind a not so ideal mono sound, Horszowski with either Toscanini or Casals.
Mozart: Piano Concerto No. 27 in B Flat Major, K. 595 - II. Larghetto
Mozart: Piano Concerto No. 27 in B Flat Major, K. 595 - I. Allegro (Cadenza by Mozart)
Mozart: Piano Concerto No. 27 in B Flat Major, K. 595 - III. Allegro (Cadenza by Mozart)
Mozart : Piano Concerto No. 27 in B flat major, K. 595 - III. Allegro
Mozart concerto kv 595 Horszowski Casals
Hope that helps.