Here's PFF's grades for 2018 out of 314 OL
Linder - 31
Flowers - 102
Henderson - 119
Isidora - 235
Feliciano - 268
If you go by 5 starting OL x 32 teams = 160 starters, then....
Elite - Linder
Solid Starters - Flowers, Henderson
Backups - Isidora, Feliciano