Terell Suggs springs to mind.
If Alonso hadn’t of leaned in towards Flaccos head with his shoulder his momentum would have carried him over Flacco and no hit would have taken place. It was an out and out cheap shot. There was reports Flacco was bleeding from the ear. That’s a very dangerous hit to put in on a player.
I sometimes sympathize with linebackers,DL and corners alike with how the game is set up to protect the QB and the passing nature of the league. Hits like this will only restrict defensive players further in terms of how much protection the QB and his targets will get in future.