No one person is going to be "the answer," unfortunately. That is why we NEED to trade back. For the most part, teams use the 1st and 2nd rounds of the draft to find immediate starters, and use the 3rd/4th round to find potential starters or "project players." The rest are just used to find good depth at thin positions.
this is why we MUST trade down and get a second, and perhaps trade down that second pick to get another 3rd/4th.
As far as Ansah goes, we cannot pick him at 3, nor can we pick anyone at 3... we need to find a way to get a 2nd round pick. I would love to take Ansah at 8,9,10,etc. Because truthfully (and don't tell any other teams) Ansah is the best DE coming out of this draft. Werner and Moore are more proven, but that doesn't make them better, it just makes them a safer pick.
It seems I have rambled on a bit.