A look at my 43 Defense in MFN-7 as Denver.
LDE Bolden 24: 100 SP 100 AC 100 ST 100 INT 100 DIS 55/75 TL 84/89 PR 82/90 RD
DT Sexton 26: 24 SP 100 AC 100 ST 100 INT 100 DIS 96/100 TK 89/100PR 98/100 RD
DT Klinger 26: 26 SP 57 AC 88 ST 100 INT 61 DIS 97/100 TK 97/100PR 98/100 RD
RDE Evans 25: 100 SP 69 AC 61 ST 34 INT 49 DIS 49 TK 39 PR 75 RD
SLB Velasquez 24: 100SP 100AC 100ST 100 INT 100 DIS 68/69 TK 91 PR 75/79 RD
96 PUN 78 ZC 78/82 M2M
MLB Humphreys 28: 77 SP 73 AC 79 ST 69 INT 84 DIS 90 TK 98/100 PR 96 RD
100 PUN 100 ZC 100 M2M
WLB Shepard 24: 100 SPD 100 AC 100 ST 100 INT 100 DIS 58/70 TK 73/83 PR 68/79 RD
83/87 PUN 64/73 ZC 54/73 M2M
CB Jones 27: 83 SP 98 AC 59 ST 98 INT 91 DIS 72 TK 22 PR 82 RD
83 PUN 81 ZC 75 M2M
CB Bradley 27: 70 SP 95 AC 48 ST 100 INT 94 DIS 86/88 TK 91 RP 46 RD
100 PUN 91 ZC 83/84 M2M
FS Powell 26: 100 SP 100 AC 79 ST 89 INT 23 DISC 96/100 TK 94/96 PR 29/36 RD
54/57 PUN 100 ZC 59/66 M2M
SS Fletcher 29: 100 SP 99 AC 97 ST 95 INT 94 DISC 100 TK 14 PR 100 RD
98 PUN 100 ZC 99 M2M
So you see Speed at RDE, LDE, WLB, SLB, FS and SS. The rest of the Defense is a combination, my CBs aren't fast but one can Pass Rush while the other can Run Stop and both can Tackle fairly well. Both Safeties can Tackle, one can Pass Rush and one can Run Stop... Both can Zone and the SS can M2M. I just keep the FS in Zone or Blitz.
The DL is awesome... 2 Strong DTs eating the OL, two Fast DEs blowing by for Sacks.
The OLBs are Fast and Strong, can get all over the field and Punish or get to the QB. The MLB is slower, but can Cover like a dang CB and is also great at Blitz and Run D. While not the best Tacklers, my OLBs make up for it by swarming.
And it all starts with LDE Phillip Bolden getting about 2.5 Sacks per Game and getting a billion Pressures so my CBs don't have to cover long and my LBs can quickly collapse to interrupt any weak passes.
Without my OLBs, this Defense isn't nearly as effective... despite how stocked it is. While Bolden is the biggest Impact, his Impact would be lessened if guys were passing all over my LBs.