I don’t know if anyone responded to your comment “I haven't heard any live Harrell recordings. Have you?” ….Tom has a “Live At The Village Vanguard” recording which is very good. Also, there is a DVD release of Horace Silver’s band playing somewhere in Europe with a younger Tom on trumpet.
As a sideman, he also worked with Phil Woods and that group released at least one live album: "integrity".
Seems there are two live "Vanguard" releases as a leader: 2002's "Live at the Village Vanguard" and 2013's "Colors of A Dream: Live at the Village Vanguard".