Barry Sanders WAS the Lions in the 90s...
QBs:
Gagliano
Peete
Kramer
Krieg
Mitchell
Batch
throw in Ware, Magic-man, etc...
teams keyed on Sanders....
And I'd like to point out that one of the best DBs of all time (Corner and Safety) Rod Woodson had his corner career cut short because that little bugger could turn on a dime. Sanders deserves his accolades. He could have easily kept ahead of Smith had he not gotten tired of football. He was not only good, but he was good in a bad system.
I've always liked DBs to be quick enough to cover man but strong enough to support the run. Rod Woodson and Ronnie Lott were tops, IMO.