A couple of things.
Harrison is a true 1Tech so he'd be competing with Dontari Poe for reps, not replacing McCoy's departed 3Tech reps.
Dareus seems like the biggest name out there but some real concerns there. He's played 58 out of a possible 80 games the past 5 years. He's got character and medical concerns.
This is the Front Office's chance to prove everyone wrong about their decision to (over) pay Tyrone Crawford and (over)draft Trysten Hill.
Cliff notes: Finding a 3Tech will be a priority in the off-season.
I'd look at the bottom teams in the league and see if I could turn a late (or conditional) Day 3 pick into a player who could contribute now.
Possibilities:
Jacksonville, Taven Bryan
Jacksonville, Tim Jernigan (they just signed him off the street)
Carolina, Kawan Short
I don't know if the Bears would give him up, but someone I've been monitoring since his UTEP days is Roy Robertson-Harris. Not as twitchy, but at 6'5" 292 lbs., he kind of reminds me of David Irving.
Speaking of David Irving....
Huh? Maybe?