Clifford, Evans, Ivey, Saunders, and even McClain who hasn't gotten targeted much lately.
It's not unheard of for players to take a while to develop and produce. My opinion is that a some of the WR "problems" are the result of a pathetic offensive game plan, poor play calling and a good many inaccurate throws by Allar when he finally did have open WR's. Just a few plays ago Allar had Cephus with a step on his man and he underthrew him allowing the DB to break up the pass. The completion he had to Johnson was an easy, short throw that Allar threw at his feet. Allar has been a less than average QB this season.