Keith Jarrett's one of my favourite artists, although I explore his stuff extremely slowly. Personally, I've never had any problems with his vocalising along with his piano, his albums are normally mixed so that it's barely noticeable, and if not, it's not as distracting or as bad as people make it out to be.
I haven't bothered with his Standards Trio, beyond an album called Changeless (which is apparently his trio's album which is most like his solo stuff).
Recently, I've been listening to his early Bremen/Lausanne album. Incredible concerts. Really dense material, a lot more challenging than other solo concerts of his I've heard, but still very melodic and catchy in a lot of parts.
I really want to hear more of the music he made with his American and European quartets. All I've heard at the moment is The Survivors Suite, possibly one of my favourite jazz albums.