Is it only touching that freaks him? What about things coming towards him? If it's only things touching him, I'd say avoid:
It's Tough to Be a Bug - things poke you in the back and your seat
Honey I Shrunk the Audience - there's only one bit when you get something touch you, if you PM me I can tell you when (don't want to spoil it for anyone)
Stitch - definitely one to avoid, Stitch jumps on, pokes, prods and belches at you
Those are the main ones, really. As mickey&minniealways said, some of the coasters you get pushed into each other a bit, though some of them have everyone one in front of the other. If he has problems with things coming at him, I can add to your list.
Oh, is he OK being sat next to you or someone else he knows? If you move a little and brush his arm, could that cause a problem? If so, on rides where you sit next to one another (such as It's a Small World, Pirates, shows etc), you might need to ask the CM to leave a little more room in your row, so he can have room to breathe. If it's not too busy, you could probably leave an empty seat on either side of him, if needed.