In the era of John Ruiz, a fighter who has been WBA champ for a while although displaying poor ability it begs asking what other champions reigned long as champ while not being particularly gifted in the skill department.
Notable mentions:

Ray Mancini

Arthur Goreon

Frankie Liles

Keith Holmes

Any others?

I never thought much of Virgil Hill.

What about Sven Ottke?
He really sucked and retired undefeated