Yep, Sgor Gaoith is a good call, nice but straightforward walk from lovely Glen Feshie, then some fabulous views and big drops on the other side.
The walk through Rothiemurchus to the Lairig Ghru is good too, without visiting any summits.
If you just want an “easy” hill, those to the west of Drumochter are quick and you start high. A ‘Mharconaich probably the nicest. They’re not exactly sharp ridges though!
Creag Dhubh, just south west of town, is supposed to be good.
I would say, if you’re planning a day on Skye, its going to be a long one! 2 1/2 hours just to the bridge. I’d maybe be looking instead at places like Glen Affric, one of the most beautiful glens, which also has a choice of hills.
Arisaig/Glenfinnan/Loch Shiel slightly easier but you’ll still be in the car for a lot of the day (which is great if that’s what you want to do, no better place to gaze out of car windows). You could drive to Fort William and then get the train to Mallaig (2 hours each way) for a different day, really good. If you got off at Morar you could walk down to Silver Sands and hopefully get a later train back (check!).
Walkhighlands definitely worth looking at.