Nick Saban’s Alabama Crimson Tide teams of the late aughts/early teens were some of the most unbeatable juggernaut college football teams of the modern era. And they weren’t particularly fun to watch. Their defense was an amoeba that just absorbed ball carriers for no gain while the offense plodded along for 3-5 yards at a time with an occasional big play here and there.
Not exciting. Lots of championships.
Kirby Smart was a long-time lieutenant to Saban and crafted his Georgia Bulldogs in a similar manner: defenses that knew exactly what you wanted to do and eliminated it with a few havoc plays here and there.