Checking out the walk you did to Carn Aosda, it's about 2 miles total distance, with 260m ascent. I had the impression that this was quite challenging for you, but doable.
Starting with that as a specification, but assuming that non-munros with visual character would be equally acceptable, I suspect that the trick is to find such hills reasonably close to a road.
The ones that immediately came to mind were Sgurr a'Chaorachain and Meall Gorm, to the East and South West of the Applecross pass. The roughness of the terrain up to Meall Gorm probably rules it out, but there's a track up to Sgurr a'Chaorachain, it's about a mile up, and just less than 200m of ascent. And most importantly, there are phenomenal views
. Check them out and see what you think.
Here's a link to a WHR with some fantastic images that should get the pulse racing...
viewtopic.php?f=9&t=44025
It's probably a longish drive, but you will be driving through inspiring country....
Good luck, and whichever ones you do, be sure to write a report