The Tennessee Titans 2017 free agency class was such a mixed bag of success.
In that class the Titans signed maybe the best slot cornerback in the NFL in Logan Ryan who has been exceptional in every phase despite not tallying an interception yet. His ability to lock down opposing safety blankets and come up big in the box has been huge for the Titans (76 tackles, 4 sacks, 4 TFLs, and 5 QB hits last year alone).
Johnathan Cyprien was a mixed bag because when he played he was really solid as a true old school, thumping safety.