Thought I'd start a thread and see if we can compile a full list of the playable characters. I'll start with the ones I have:
Set 5.1
Jasmine Limjoco - Mountain Climber
Cynthia Agumanu - Assassin
Bethany Shaw - Rancher
Richard Hyeon - Pharmacist
Emanuel Lee - Construction Worker
Father Cavanagh - Missionary
Set 5.4
Laila Nejem - Wildlife Photographer
Gruh-gruh - Wild Man
Dre Jordan - Football Star
Kimmy Sanders - Personal Trainer
Alexei Smirnov - Handyman
Monica Garcia - Dancer
Both sets ended up with one character whose special ability was partially or completely dependent on there being other survivors playing so would not be ideal for solo play