Among the following, who was a trumpeter that formed two studio bands, the hot five and the hot seven, and recorded hotter than that, which features "scat"?

The correct answer is Louis Armstrong.

He is one of the most famous and influential musicians when it comes to the jazz genre, having performed between the 1920s to the 1960s. Even though he died almost 50 years ago, he is still considered to be one of the fundamental people who gave rise to jazz.