I scanned the PFW article and it is wrong on two points:
1. Rush LBs were around before Taylor.
2. Anyone who has seen Ray Lewis play and makes anything of his supposed 4.7 speed is an idiot. Lewis plays much much much faster than that. He plays far faster than any MLB I have ever seen regardless of what time he happened to have run in a 40.
I have been following prof football since the mid-fifties. LT was the best pass rusher ever from that position. Sure, there were blitzs by linebackers, but basically the linemen were the pass rushers with LBs in pass coverage and as run stoppers. LT changed all of that. Name me an LB who rushed the passer more and better than LT prior to LT.