Regardless of where Peppers projects in terms of the defensive backfield, he doesn't make any logical sense for a first round pick on this team. I think he's going to be overdrafted because he's a dynamic player and is probably a bit overhyped, but this team doesn't need any help at safety or in the slot, really. The majority of our corners are at their best in the slot as it is and safety is likely our biggest defensive strength.
In terms of others, I don't understand the love for Charles Harris. I see very little about his game that shows me a first round pick. Subpar athleticism, not very refined set of pass rushing moves, not overly violent, I just don't get it. I get he's newer to football so the potential is there but I just don't see the mentality of a great defensive end.
If it's me, ideally somebody falls (Lattimore, Allen) or you take one of the other guys projected as BPA (Conley, Ross, Foster, Howard). I'd be ok with Barnett - he reminds me a lot of Brandon Graham - but I don't think there are any standout pass rushers that will be available at our pick. I also don't like drafting running backs this early unless you're further along in your team's development, especially on the offensive line.