Yes, you'll need a negative tiller.
I recently built a bow for a friend who shoots with a fixed crawl. I gave it 1/4" negative tiller. The bow kind of sucked when I shot it with split finger, but when I moved my hand down to where he puts his with his crawl, it calmed it right down. He loves it.
Funny thing is, he's asked some professional bowyers to build him a bow with a negative tiller to accommodate his shooting style and they are reluctant to do so.