This is a great answer. They not only have a couple of goofy songs like Boris but also let their goofball personalities shine like on the album (The Who Sell Out?) that has the little ad jingles and the cover with Townsend using a giant deodorant stick and Daltrey in a bathtub full of baked beans.
Maybe Beck? Que’ Onda Guero always makes me giggle.
And, a bit of a different genre but Father John Misty’s songs are sarcastic and often nonsensical. They sound all romantic and dreamy but the lyrics don’t always match the vibe.
I thought of another one. That band Bloodhound Gang has some goofy songs. Obviously they have that one over-played song, but they also have a song that is just Ralph Wiggins quotes.
Thank You Scientist are seriously talented musicians who make very complex music, but don’t take themselves seriously and have fun with their performances.