RB Depth in Dynasty League

Dynasty league 0.5 per super flex, I am looking for RB depth… My top RB situation is Zeke, Derrick Henry, Nyheim Hines, Devin Singletary, and Tony Pollard. I have a good amount of young WRs with TE depth also. mainly an RB3 option or someone to fill in as starters if my top 2 go out. Thoughts on who I should target? And who I should be offering?