I agree with what the others have said...control does not come from the hands, it comes from leg and seat, and even before that with good, solid training and respect. I suggest taking a closer look at your control problem, whatever it may specifically be. If you can fix the issue, you ought to be able to find a mild, smooth snaffle your horse likes and you'll be better off for it.
IMHO, the less artillery in the mouth the better. That being said, I've known horses who LIKED harsher bits, honestly did, for whatever reason. But most don't.
The thing is here, what concerns me is, you are obviously relying on your bit for the control, and the bit is an aid, not a lifeline.
Cinnamon Whiskey 11 y/o 15hh Chestnut AQHA mare, 2'6 Jumpers