Dwight
Dwight’s only appearances on Modern Family were in the eighth season. He was the hero football player from Cam’s team and was nearly forced to move to another school. Not wanting to lose his star player, and since there was an extra room upstairs, Cam lets Dwight stay rent-free, which annoys Mitchel at first.
There was even a brief moment of romance between Dwight and the second Dunphy child. He wasn’t the main part of any storyline, but he had his moments. However, that didn’t last very long as Dwight suddenly left the show. If you know anything about the actor, then you probably understand why he departed the Modern Family universe.