Cool H-B Record Sleeve Art

A co-worker of mine hipped me to this web page that sells obscure LPs converted into cheap mp3 files. I was excited to see that they have a couple of the old Hanna-Barbera records there, too! If you get an album from the site, they throw in a scan of the album sleeve. Neat!

I saw a bunch of these when I was a kid (on the back of the Pebbles & Bamm-Bamm LP), and always loved the 'realistic' lighting applied to 'cartoony' characters. I still think they look awesome - even the font choices are cool! Does anyone know who painted these?