New to dynasty, what Tier RB could I Get for Jonnu Smith

First time dynasty owner in first year of brand new league. It’s a TE premium league 1.5 ppr for TE’s. I have Kittle and Jonnu, what could I reasonably expect to get if I were to trade Smith. I really need RB’s since my top two are CEH and Bell, especially if he signs with the Chiefs. I really have no clue on value and what I could ask for. By the way I can start 2 TE’s in my lineup every week if that makes a difference.