The sacks ranking is probably 90% fools gold. The large majority of the time we get sacks is when a) we bring the house with 6+ blitzing or b) the QB holds onto the ball way too long with a sack resulting from his stupidity, not because of our LB's pass rushing skills. Just look at how great our pass rush was when we brought 4 against the Titans (or just about anyone else for that matter), worthless. An inconsistent pass rush that requires 6 or 7 men to get pressure + an inconsistent secondary is the reason our pass defense is absolutely pitiful.
I was all about drafting an OT in 1st round, but unless somebody amazing drops we need to be looking at a rushing OLB. The great state of Texas probably holds the 3 best 3-4 rush OLB prospects in the draft.