In reply to yorkshire_lad2:
You have Schiehallion on your doorstep. A bit tedious when the clag is down, but if you have clear skies it's well worth doing.
You're also a shortish hop to the Lawers range - an obvious one is to do Beinn Ghlas and Ben Lawers, with a descent from the col between them north and a return down Coire Odhar. https://www.walkhighlands.co.uk/perthshire/ben-lawers.shtml
And the nearby Tarmachan Ridge is a fantastic day if you're ok with the occasional bit of airiness. It isn't on the map here but it's worth continuing on to Creag na Caillich and descending south(ish) before swinging round east to pick up the track out from a small hydro dam. https://www.walkhighlands.co.uk/perthshire/meall-nan-tarmachan.shtml
https://www.geograph.org.uk/photo/792532
It also looks like there's plenty of options from Kinloch Rannoch itself, but I've never done them, eg:
https://www.geograph.org.uk/browse.php?p=685326