My current database...
A little incomplete on DC and years coaching for current team, but here it is.
AFC East
BUF **** Jauron (1)/Perry Fewell (1) 4-3, Cover-2
MIA Nick Saban (2) 3-4 hybrid
NE Bill Belichick ( )/Dean Pees (1) 3-4 hybrid
NYJ Eric Mangini (1)/ Bob Sutton 3-4 hybrid/(trans)
AFC North
BAL Brian Billick ( )/Rex Ryan (2) 46 variation
CIN Marvin Lewis (3)/Chuck Breshnahan (2) 4-3/rare 3-4
CLE Romeo Crennel (2)/ 3-4 hybrid
PIT Bill Cowher ( )/ 3-4 ZBtz
AFC South
HOU Gary Kubiak (1)/Richard Smith (1) 4-3 (trans)
IND Tony Dungy ( )/Ron Meeks ( ) 4-3/Tampa2/1 gap
JAX Jack Del Rio ( )/ 4-3/zone coverage
TEN Jeff Fisher ( )/ 4-3
AFC West
DEN Mike Shanahan (12 )/Larry Coyer (4) 4-3
KC Herman Edwards (1)/Gunt Cunningham 4-3/some Cover-2
OAK Art Shell (1)/Rob Ryan (2) 4-3
SD Marty Schottenhemier ( )/Wade Phillips 3-4
NFC East
DAL Bill Parcells ( )/Mike Zimmer 3-4
NYG Tom Coughlin ( )/Tim Lewis 4-3
PHI Andy Reid ( )/Jim Johnson 4-3
WAS Joe Gibbs (2)/Gregg Williams 4-3
NFC North
CHI Lovie Smith ( )/Ron Rivera 4-3/Cover-2
DET Rod Marinelli (1)/Donnie Henderson (1) 4-3/Cover-2
GB Mike McCarthy (1)/Bob Sanders (1) 4-3
MIN Brad Childress (1)/Mike Tomlin (1) 4-3/Cover-2
NFC South
ATL Jim Mora, Jr ( )/ 4-3
CAR John Fox ( )/ 4-3
NO Sean Payton (1)/Gary Gibbs (1) 4-3
TAM Jon Gruden ( )/Monte Kiffin ( ) 4-3/Cover-2
NFC West
ARI Denny Green (3)/Clancy Pendergast (3) 4-3
STL Scott Linehan (1)/Jim Haslett (1) 4-3 poss trans to 3-4
SF Mike Nolan (2)/Billy Davis 3-4
SEA Mike Holmgren ( )/Ray Rhodes 4-3
4-3 CIN, HOU, JAX, TEN, DEN, OAK, NYG, PHI, WAS,GB, ARI, SEA
4-3/Cover-2 BUF, IND, KC (some), CHI, DET, MIN, TAM
4-3/3-4 hybrid MIA, STL
3-4 NE, NYJ, CLE, PIT, SD, DAL, SF
46 BAL