Unknown Mortal Orchestra are songwriter Ruban Neilsen (guitar, vocals), Riley Geare (drums) and Jake Portrait (bass). They came to initial attention by releasing the song Ffunny Friends to their bandcamp page without revealing the artist. The crossposting and attention that the single gained led to the revelation that the work should be attributed to Unknown Mortal Orchestra.
Regrettably Pitchfork has a strong read on how this song operates today in relation to let's say the history of R&B:
"So Good At Being In Trouble" doesn't catch the shit it might have in the past. This is what "indie R&B" used to mean-- old-fashioned white boy Muscle Shoals homage, the kind that would have raised a few eyebrows in a less fractious time.Indeed this song really does sound like what might come out of Muscle Shoals Sound Studio today if it weren't so danged lo-fi and if you could scrape the impression that they made it in an egg carton stapled closet out of your mind.