I've been wondering who in this community is interested in MBTI. Here are my thoughts on LotR characters MBTI and Enneagram (based on the books):
I'll start with the Fellowship:
Frodo - INFP 9w1
Sam - ISFJ 2w1
Merry - ISTJ 5w6 (An uncommon typing for him, I know. He's usually typed as an ENTP, which I would say he probably is in the films, but surely not the books.)
Pippin - ESFP 6w7
Gandalf - INTJ 5w4
Aragorn - INFJ 1w9
Legolas - ISTP 9w8
Gimli - ESTP 7w8
Boromir - ESTJ 1w9