Other types of bodies not mentioned yet that might affect clothing measurements: Manny Taur (boy, more muscular with a bull head), Create-A-Monster Harpy, Inner Monster Genie tail, Wydowna Spider (six arms), Skelita Calaveras (skeleton), there's also a Create-A-Monster skeleton, and the 17-inch dolls coming out later this year (they so far include: Gooliope Jellington, Frankie Stein, Draculaura, Clawdeen Wolf). There might be more, but that's all I can think of off the top of my head.
Mouscedes King is another doll with a Little Sister body, but she'll be released later this year. The mermaids Eseme mentioned are Sirena Von Boo, and a Create-A Monster mermaid. The Centaur is Avea Trotter.
You guys might want to check this site if you want MH dolls made in custom colors. There are also different and new body types and accessories:
http://plastic-curves.com/index.phpEdit:
It looks like the removed some of their body types. The only ones they have left are the girl jointed natural torso, and the male muscular torso, and they are both currently sold out. They still have a lot of their accessory parts though, but I guess that won't help people looking for custom body colors.