/co/ has had Grievous and Zorak, who I would call campaigner underdogs in the sense they weren't expected conventional powerhouses that got a lot of exposure from good campaigns. I wouldn't call them "campooner" in the sense people voted because of campaign, but rather it felt like the character was genuinely appreciated and enhanced by the campaign.
/v/ is the board that goes for campooner underdogs and the epic narratives though, like Recette, Batter, Shadow, arguably Grimm.