You’ll be spoilt for choice! Ten days to fit in the highlights of Scotland??
Good luck with that!
Have to say, I think you might risk over-dosing on dramatic mountain landscapes!! You’ve omitted the SW and the NE of Scotland; two beautiful and obscenely under-rated areas. Ok, so they don’t have the dramatic landscapes of Torridon, Skye, the Cairngorms, etc. But they have a beauty and character all of their own. (I think you could easily omit Loch Lomond and the Trossachs and not miss much.) There are some fabulous towns and villages up and down the Aberdeenshire, Banff & Buchan and Moray coast. Likewise the SW too – areas like Whithorn, Wigtown, Kirkcudbright, for example. (Dumfries and Galloway is a relatively undiscovered gem.)
Having said that, I would definitely recommend the extreme NW: Durness, Tongue, Eriboll….there are some fantastic, secluded beaches there. In good weather, Ben Hope (the most northerly Munro) can be done in 5-6 hrs.
If you’re going to the Western Isles, check-out Bosta beach – a hidden undiscovered gem - one of my favourite places in Scotland.
Avoid North Lanarkshire. Infact, avoid the whole of Lanarkshire full stop.