Roland, ISTJ.
Eddie: ESTP
Susannah: ISFP ( not sure on her )
Jake: INFJ
Cuthbert Allgood: ENTP
Alain Johns: ENFP
Susan Delgado: ESFP
Cortland "Cort" Andrus: INTJ
Abel Vannay: ENFJ
The Crimson King: uh INTJ?
Jack Mort: INTJ
Rhea of the Cos: INFP
Mordred Deschain: no idea.
Enrico Balazar: ISTP
Dandelo: ENTP

Didn't put a huge amount of thought into this, please correct me with explanation. Id say every one is up for discussion.