There's not rlly much competition, Tanya looks like a melted bratz doll in the anime Ravenquill
All the characters look weird in the anime. Anson Sue looks like a thug, Visha (Second Lieutenant Serebryakov) and Mary also look like melted Bratz dolls, as you described. Also, General Zettour and Dr von Scheugel in the anime.......BIG FAT NO!
I believe that the manga's art is superior to the anime. It is impossible to change my mind.