I agree that this one was probably a higher-end EF4 even though the DIs didn't quite get it that rating. Definitely in the same ball park as Holly Springs and Perryville.
The EF5 tornadoes on 4/27/2011 are pretty much in a league of their own when it comes to violence, to a point where most of the F5 tornadoes on 4/3/1974 almost look tame by comparison, but the EF4 tornadoes were unusually violent too. Personally I don't have much doubt that the Cullman/Arab tornado, the Tuscaloosa tornado, the Flat Rock tornado, the Rose Hill/Enterprise tornado, the Ohatchee/Piedmont tornado, the Ringgold tornado, and maybe the Dadeville tornado could have caused EF5 damage if they had hit more/better-constructed structures at their max strength.