I would go Forte and Turner.Forte may have a little difficulty but my guess is they will throw to him a lot and can exploit the def that way. Turner is going against a good run def too but I could see 80-100 yrds with a TD.
Young is intriguing this week going up against a terrible run def. With 20-25 carries he could get 200yrds but if he gets only 5 carries he won't be worth starting. You never know with the Bronco RBs.
If you have a flex you may want to gamble Young.
Good luck