re: Trade Offer Opinions - need to replace Jamaal

Need advice on a similar trade. Ive got RBs and the Jamaal Charle sowner wantes to make a deal. What should I ask for and what can I expect to get? Id like to get a legit starter that I can plug in the flex, ideally AJ Green but is that just a pipe dream? He wants Foster and might consider Lynch. Said he is willing to deal Evans or Tate.
Thank in Advance

Standard Scoring
My Team
QB: Tyrod, Big Ben
RB: Lynch, Foster, Ingram, Gio, Duke Johnson
WR: OBJ, Hopkins, Moncrief, Travis Benjamin, Snead
TE: Kelce
DEF: Panthers

His Team:
QB: Matt Ryan, Kaep
RB: Charles, Chris JOhnson, Joique, Crowell, DeAngelo Williams
WR: AJ Green, Mike Evans, Golden tate, Mike Wallace, Crabtree
TE: Graham, Vernon Davis
Broncos DEF