They're both in the aforementioned Colorado Snow Climbs book, but North Star Mountain and Atlantic Peak have fun beginner ridge runs. Kelso Ridge on Torreys Peak can be done in winter, you just have to skirt a slide path on Kelso Mountain during the approach. A few 14ers have easy, broad ridges too, but they're not as exposed as the routes in Colorado Snow Climbs. Elbert, Quandary, Humboldt, La Plata and Yale spring to mind (all walk-ups).
I completed my first couloir season this year with climbs, in order, of the Angel of Shavano, Cristo, Boudoir, Dead Dog and Lost Rat. None exceeded a "moderate" rating except perhaps the last few feet on Dead Dog. They all served well for a beginner, particularly Cristo (a popular group training ground for the CMC and other organizations). These sufficiently built my confidence and skillset, and I'm excited to try some harder routes this spring.