I kinda doubt there's ever going to be a draft with more depth at OT than CB...just not enough humans beings walking around at 6'3+ and 300 lbs+.
With that said there are some pretty good 2nd/3rd round OT prospects this year- can see these guys going anywhere between picks 20-75
Teven Jenkens, OK St (RT only)
Dillon Radunz, N Dakota St
Samuel Cosmi, Texas
Alex Leatherwood, Bama
Walker Little, Stanford (big time injury concerns)
Liam Eichenberg, Notre Dame
Jalen Mayfield, Michigan (RT)
James Hudson, Cincy (high upside, little experience)