I have the following 3 choices for keepers and I draft in the 7th slot.
It's a standard scoring league no PPR. And we start 1 QB, 1 RB, 2 WR, 1 flex WR/RB, 1 TE, 1 K, 1 D
You lose a pick in the round that you drafted the player last year. And You can only keep a player drafted after the 5th round - So there wont be too many high profile players gone.
Vernon Davis (for a 14th round pick)
Steve Smith-Giants (for a 10th round pick)
LeSean McCoy (for a 7th round pick)