Good lord. In the video for one of their awful songs, "Airtight" (I watched it on mute) there is a screenshot at the end of a bunch of cribs all crammed together. WTF. And thats definitely Alefantis as Majestic Ape, yes. Amanda Kleinman is the keyboardist.

They both play Majestic Ape. Alefantis and Kleinman have turns. Clearly different people from one video to another. And the voice is a gay male.