Don't listen to the jerk below - he calls the music crap, so I can call him a jerk, right? Lacy is one of the most influential interpreters of Monk's music. He even played in Monk's quintet. And his approach of Monk was revolutionary at the time, even back in 1966 - his School Days quartet was the first piano-less group devoted to the music of Monk, a pianist. The first and not the last one (see Jean Derome's Évidence Trio as, ahem, evidence of this).