He was a multi-talented performer; I know him primarily for taking on the thankless role of trying to replace Don "Barney Fife" Knotts on The Andy Griffith Show. Burns' character was the deputy who replaced Knotts. Knotts left the show to make movies, but also because he realized that Andy had been grumbling that he'd leave the show after five seasons for "better things" (Griffith ended up staying for a while longer because the better things hadn't materialized). It had to be a hell of an adjustment for the scriptwriters as well as for Griffith (who had a great rapport with Knotts). Anyway, Burns also worked with George Carlin, Avery Schreiber and many others.
https://doyouremember.com/112007/jack-burns-dead