https://www.metv.com/stories/harvey-korman-loved-being-in-the-background-on-the-carol-burnett-show

Korman didn't need to shine bright to be considered a star.

Tim Conway didn't take a technical approach to comedy (https://www.metv.com/stories/tim-conway-didnt-take-a-technical-approach-to-comedy)

Conway was an off-the-cuff comedian.