Hi Gord, suggestions - Oscar Peterson, Art Tatum, Erroll Garner, Ralph Sutton, Jessica Williams, Albert Ammons, Teddy Wilson, Ellis Marsalis, Marcus Roberts, Tommy Flanagan, Bud Powell, Mel Powell, Earl Hines, Pete Johnson, Andre Previn; some of these often recorded with a trio, typically bass or guitar and drums, but still come across sounding almost solo. These are not from a Google search, but from my own collection plus some from last.fm.
You should find many of them on Amazon with MP3 samples so you can try before you buy! I'll go through my stack of CDs and get Album names if you want specifics.