Here's a piece with Bix Beiderbecke improvising on Hoagy Carmichael's "Riverboat Shuffle" (which Bix had him rename from "Free Wheeling"). Bix died in 1931 at age 28. Paul Whiteman kept his salary going while he was sick at his folks' home in Iowa.
Whoa there, JB Young. Both Bix and Louis are among my top favorites. Each had distinctly different styles with uniquely different musical forms they contributed. To me both were among the very best of all time jazz musicians. Some of Bix's playing just happens to move me more than what I've ever heard from Louis. But if I had to truly rate one over the other I couldn't do it.