Richie Powell is one of my favorite hard bop pianists. His vocabulary is clear and accessible and this solo is a great example of that. He died at a young age in the same accident that took the life of his contemporary (and bandleader on this album) Clifford Brown.
Listen for the inventive rhythmic variety that helps the blues scale come to life and the way the energy builds over the three choruses, resolving gracefully in the lower octave.