K'Waun Williams
Among all these options on the list, K'Waun Williams might be the most likely because he fits the need best for the Buffalo Bills. He has played eight seasons in the league beginning with the Cleveland Browns before playing five with the 49ers and last played with the Browns in 2022.
Williams missed the entire 2023 season due to an ankle injury but is reportedly medically cleared to return.
The reason that Williams would be a good fit is that he has primarily been a backup but has started at least four games every season he has been active. He may not begin the year as the starter but due to injuries can step in and has been pretty productive when given the chance to play.
Entering the 2024 season, the Bills should be committed to Christian Benford and Rasul Douglas as their starters. The question becomes whether or not they are confident in Elam if either starter misses time. It is tough to imagine that being the case