Full Tilt Ice Cream has several vegan ice cream options.
http://www.fulltilticecream.com/
Ballard
5453 Leary Ave NW, Seattle, WA 98107
206-297-3000
Columbia City
5041 Rainier Ave S, Seattle, WA 98118
206-226-2740
White Center
9629 16th Ave SW, Seattle, WA 98106
206-767-4811