Fair enough. I mean, maybe it's worth breaking down some areas in Scotland that are kind of discrete in themselves.
Edinburgh & Environs: Here you have the history and culture of the capital of Scotland. In the environs, there is Falkirk, Bannockburn, and Stirling for those with an eye toward Scottish history. If you like moody abandoned castles, there's Blackness Castle and Linlithgow Palace. And for those who are interested in engineering, there's the Forth Bridge and the Falkirk Wheel.
Glasgow & Environs: As you note--a historically working-class city that is rapidly gentrifying. So there's really a good vibe there with some fun things to do. Kind of a Scottish Detroit. Just north of Glasgow is Loch Lomond National Park, which is absolutely stunning.
Oban, Glencoe, & Islands: Past Loch Lomond is Oban, which has the distillery (one of the rare ones that is actually in a town) and is also the port for a bunch of ferries to the islands off the west coast of Scotland, including the Isle of Mull with its early Christian Iona Abbey and Islay for those of us who actually like whisky. An hour from Oban is Glencoe, which is kind of the hiking area you think of when you envision hiking in the Scottish Highlands.
Skye: Further north is the Isle of Skye. It's a long way up there, but damned, it's beautiful.
Cairngorns: Kind of in the middle is Cairngorns National Park, which is a nice area for hiking. But I have to tell you, I think it's kind of underwhelming. The one thing I really would recommend is a sheepdog demonstration--they're fucking amazing.
I'm not going to really talk about Aberdeen or Inverness because . . . why would I?
With a week, you probably have time for about two of those. Personally, I might do Edinburgh for a couple days and head over to Oban via Glencoe. But I could easily be persuaded to go to Glasgow and hoof it up to Skye via Loch Lomond.