Depending on how confident you are, Sefrit, is an excellent early spring/winter ascent. Not quite a scramble though as you will need rope, rap chord. Its a couple pitches of 4th.
Its the main peak on the right as you go up to Hanagen pass.
I haven't done the NW glacier route though in winter it would be shorter.
Other scrambles of note in the winter time would be peaks in the Foss drainage. Index, Baring, Persis, Gunn. LOTS of elevation gain. 5-6000 vert on all of those.
All of the peaks mostly unnamed from mt. Daniel to Hwy 2 are all excellent scrambles. LOTS of lakes up there and meadows. Perfect area for learning route finding skills. Cathedral peak has a touch of class 4 on it and may not be your cup of tea.
Heck, 80% of the peaks in WA are scrambles. Depending on route more like 90%. Just pick one and go. You will learn to love THICK timber and abhore open areas. See sun, RUN IN THE OPPOSITE DIRECTION! Unless you love inventing new curse words as you impale your stupid ass on devils club, salmon berry, gooseberry, slippery mud/moss/rock/tree, vinemaple thickets, slide alder thickets, mountain hemlock thickets and who knows what else.