What lonely repairman has been played by Jesse White Gordon Jump and Hardy Rawls?

The lonely repairman you're thinking of is "The Repairman" from the TV show *WKRP in Cincinnati*.

Here's why:

* Gordon Jump played the role of Arthur Carlson, the station manager who was often seen attempting to repair things around the station.

* Hardy Rawls played Venus Flytrap, a station janitor who was sometimes called upon to do repairs.

However, neither of them were the *main* repairman character on the show. There was no recurring character specifically named "The Repairman".

It's possible you're misremembering the show, or thinking of a different character altogether.