And no, I don't mean Bix and the 1928 recording. https://www.youtube.com/watch?v=LECApS0uGLU This will probably always be disputed, but I agree with Don Rayno that "on balance there is more that points to Margulis as the soloist than to Bix." http://www.network54.com/Forum/27140/me ... hree+Solos
But there really was one case where a famous  jazzman did play the solo part with Whiteman: on the 1939 recording for Decca. https://www.youtube.com/watch?v=HPwKWkK8Iiw According to Rayno, "The trumpet solo for this [second] movement would have naturally fallen to Whiteman's topflight lead man, Bob Cusumano, but he had developed a cyst on his lip, and had to beg off. Whiteman asked Charlie Teagarden to take the solo, which he did, reluctantly. Teagarden does a fine job on it, giving it a jazzier reading than Margulis did in 1928. For the closing solo of the movement, instead of Charlie repeating the trumpet solo, Jack Bell plays it on flute, a departure from the original Grofé orchestration." https://books.google.com/books?id=Z3G0ev5NRrQC&pg=PA695
Art Drelinger recalled that when Whiteman asked Teagarden to play the part, Teagarden balked: "'I can't play that. I'm not that kind of a trumpet player, Pops. I don't wanna do it. We've worked hard here. We'll have to do it another time.' Whiteman said, 'Just do one take, and if you can't do it, we'll all go home.' He played it better than anybody ever played it, and that's the take that's on the record. He played it the best I've ever heard it." https://books.google.com/books?id=Z3G0ev5NRrQC&pg=PA210
 Though not as famous as he should be, being overshadowed by his brother Jack...
My brother Charlie is greater trumpeter than Beiderbecke, says Jackson Teagarden.
Was Charlie Teagarden the nearest trumpeter to Bix Beiderbecke alive in 1940?
Charlie Teagarden compared to Bix. Whiteman talks about the word "Swing."