I take the "overrated" question to mean current and retired Seahawk players where the national and/or local consensus opinion esteems their performance and value as a player for the Hawks to be higher than I or any other individual may think.
Hmm...
--Jordan Brooks was a good call. Though his stat line suggests him to be a proficient tackler, I heard one sports columnist describe many of his tackles as "empty calorie" tackles. That kind of summed up my feelings about Brooks. Still a decent player, but I have trouble bringing to mind any instances of being "wowed" by him.
--Jamal Adams. Putting aside the games he's missed due to injury, I think people still overrate his play when he was on the field, in spite of the sack numbers he put up as a safety. The guy's got hands of stone, was caught out of position numerous times in the secondary, and wasn't nearly the consistent, hard-hitting, intimidating presence on the field that many people think he is. Jamal Adams is no Kam Chancellor. Not by a mile from what I've seen of him as a Hawk.
Those are just two recent Hawks that come to mind.