I'm usually not one to beat a dead Reman horse being, but I had to point this one out.

As it turns out, besides also playing background characters in every episode Quimp appeared in, Tom Kenny also played Mariner's ex Malvus in "An Embarrassment of Dooplers", D'Onni in "We'll Always Have Tom Paris", the Ferengi antagonists of "Mugato Gumato", and several background characters in each of those episodes.