Tough to think of best and worst at the moment, but a recent one, was the end boss of Episode Prompto for Final Fantasy XV...Turret sequence and a bad one. It actually made me angry at how crap of a boss it was, which was enhanced from my annoyance with that DLC in general. On that same level now that I remember, The first Evil Within also had a garbage last boss that was a turret sequence. Just don't have a turret sequence for a last boss unless you are doing something AMAZING with it, but mostly just don't have a turret sequence for a last boss fight.