Assuming you are already proficient with an ice axe, crampons, and 3rd class scrambling:
North Twin Sister, West Ridge. One of the best scrambles, some people may want a rope. The North Face is a straight forward snow climb.
Ruth Mountain, Ruth Glacier. Amazing views into the wild Nooksack Cirque and the Price Glacier of Mt. Shuksan. Easy glacier travel, I have never roped up but some people do. A Corgi made the summit last time I was there.
Eldorado Peak, East Ridge. Easy glacier, again I have never roped for this climb, some do.
Sahale Peak, via Sahale Arm. Great views, nice hike, easy scrambling.
Silver Star Peak, Silver Star Glacier. This is a moderate route to a very scenic summit with views to the geat east faces of the South Early Winters Spire group.