Running backs (4): Derrick Henry, Tyjae Spears, Julius Chestnut, and Jacques Patrick
Derrick Henry is Derrick Henry, and Tyjae Spears seems to be the perfect Robin to his Batman.
Similarly, Chestnut has shown the power, burst, and versatility that you want from a backup running back. While no one will mistake him for Henry or Spears, he has enough good qualities to make him a solid backup or both in a pinch.
Patrick might seem like an odd choice for this list, but he is a strange case. The Titans gave him a two-year deal when they really could have waited a few weeks and brought him in to be the RB4 without needing to guarantee any money for him.
However, the Titans signed him in the middle of August and it feels like they have a plan for him, so I'm going to assume that he makes the opening roster at least.
The hardest cut was Hassan Haskins because he is the best special teams player on the roster and he scored a rushing touchdown in the first week of the preseason. However, Mike Vrabel seems to have him in the dog house and I think the Titans could just move on.