I used CBS Sports rankings for the numbers here.
They have 20 WRs listed in their top 110 draft prospects.
Yes, this is a deep draft for the position and it is an area of need for the Chiefs.
I included all 20 prospects because some players may drop to the Kansas City slot, or KC might trade up or down, or they might take a different position in the 1st round and select a WR in the 3rd or later in the draft.
So pick whoever you actually think KC will select at the WR position.