10 Team Standard Keeper Selection

I am in a 10 team standard scoring league where we start: 1 QB, 2 RB, 3 W/T, 1 TE, 1 K, 1 DST

I have the following keeper options with their respective round cost below. I will be drafting from either 4th or 5th slot this season.

Melvin Gordon - Round 1
Adam Thielen - Round 4
Alshon Jeffery - Round 7

I’m leaning Thielen in the 4th. If you feel I have better options, which one and why?