Maybe Phinks and Feitan too (I hope not they are my favorite characters), as they couldn´t get their prophecies due to not knowing their birth date/blood type
Also, Hisoka went full Gamzee http://www.mspaintadventures.com/?s=6&p=005258
Ugh, I remember the days when Gamzee's character was most interesting until Hussie just threw it all away and made his character arc a joke.
Feitan is my favorite too. I hope Togashi expound his character and explain his origins (why is his language different) and what are the other powers he got.