- Howard Roark: INFP 8w9 Sp/Sx
- Domanique: ENTJ 8w7 Sx/Sp
- Peter Keating: ESTP 3w2 So/Sp
- Henry Camron: ENTJ 8w7 Sp/So
- Ellsworth Toohey: INFJ 3w4 So/Sp
- Gail Wynand: ESTP 8w7 Sx/Sp