12 team full PPR, 1 QB. Keep J Taylor and lose 4th round or J Allen and lose 10th round? I can keep whoever I choose for 3 years.
I will not know my draft position until afterwards.
Considering that you can keep the player for 3 years, I’d go with JT here. Stud RBs are harder to obtain than QBs.
I’m going to have to respectfully disagree with the Queen. A top QB and lose a 10th round pick, or an ok starting RB on a questionable offense for a 4th rounder? I have to take Allen here. He was the boss QB last season, and you get him for a 10th rounder? I’ll take my chances in the draft to get a better RB, and keep the best QB in the game for cheap.
I’d go with JT - In a 1 QB league, you could easily acquire another excellent QB in a later round…
I bow to the Queen’s decree and JT. 
JT, top back and young!!