You've got just about everything covered. Sold a .22-250? Good for you, I find them somewhat disappointing.
6.5mm, you have a 7-08 and that in my opinion is a better cartridge. And you have a .243 on the smaller end of the scale.
That leaves one area you don't have covered. And an area no one has touched on yet. How about a .257 Roberts?
You have nothing in .257 cal which has always been my favorite. I've been a big fan of the .25-06 for over 36 years now. You want a short action, that's why the Roberts.