overlord bob series, though i think you watch me already so i don't think i needed to tell you that.
http://toonexterminator.deviantart.com/gallery/
has some fairy and mermaid stuff.
http://locofuria.deviantart.com/
lots of were type tf's but has lots, so some should fall under the listed category
plenty others on deviant, just check the active transformation based groups for mass listings.