As for Cavalier, I agree that it's a great controlling archetype. But its usefulness in the dungeon is limited.
Well, I'll say it once and then bow out.
I think a lot of martial controller ideas, including some of those in this thread, suffer too much from attempting to fill in a gap on a grid. Come up with a good idea in terms of thematics, and then if it fills the gap, great. Don't take every mechanical option that fits into the gap and then jam it into one class.
If what you end up designing turns out to be more of a, I dunno, striker with some control elements, or whatever, then great. At least you designed a coherent, interesting class. Don't mangle that idea until its a pure controller.
A "Trapper"?I honestly think the ranger could have been an excellent martial controller if they didn't try to shoehorn it into a striker.
Klaus said:A "Trapper"?
A "Trapper"?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.