Btw, it’s Janos Starker...
The two recordings that you reference are the two standard recommendations and have been for about 40 years. However, every significant Cellist with a recording contract has recorded it, given that the repertoire for Cello Concertos
is so limited. I have to confess that I can’t recommend one off the top of my head because whenever I want to hear it I listen to Starker or Rostropovich. I have heard a number of Cellists play it in Concert through the years and the one that impressed me the most was Daniel Muller-Schott.
I would try the websites for Presto Music or ArkivMusik for listings of various performances , and then try to audition ones that sound promising to you on Tidal or YouTube.