Welcome aboard!
What @ZakHH said, plus I will add, as a Raider fan, Agholar was dropped by the Raiders for a reason: He is an ok, WR, but that is all. Not much ceiling or floor.
If you want a boom or bust player, I will refer you to my “Duverney or Brown?” post: Duverney or Brown?
I’d be surprised if you don’t have Duverney on your waiver wire. He is very much a boom or bust play, but I think you’ll like his upside weeks.
If Duverney isn’t there, I like Brown as a temporary solution. He has a good floor until Gallup comes back.