Here is my list of White Hair TsumTsum. You can complete missions that require a White Hair Tsum using any of these.
King Triton
Ursula
Mad Hatter
Fairy Godmother
Cruella
Maximus
Rafiki
Merlin
Floro
Riku
Grandpa Karl
Drossel
Humorous Drossel
Zemnas
Anthem
Periwinkle
White Queen
Ben Kenobi
Master Luke
Shonen Zeanote
Sea Witch Ursula
Karim Al Azime
Azul Archenglot