La'el Collins
At one point in his career, La'el Collins looked like he was on the verge of being one of the top offensive tackles in the NFL. He would have three straight seasons from 2017 to 2019 where he started at least 15 games for the Cowboys.
He would leave in free agency in 2022 and signed with the Cincinnati Bengals where he once again started 15 games at right tackle. Unfortunately, he suffered a torn ACL late in the season and he would miss all of last season after being released as he tried to rehab his knee.
The Bills brought in Collins because of his experience, not only at right tackle but also at guard. He is a veteran that could step in and the offensive line wouldn't miss a beat. However, he also has enough experience that after this season he would be in high demand for teams that need a starting caliber offensive tackle.
That might end up being in Buffalo if the Bills can't re-sign Spencer Brown, who is a free agent after this season. However, general manager Brandon Beane has prioritized re-signing his draft picks and its hard to imagine they don't bring him back.