In reply to climb the peak:
The wave area at Anston has a 6B, 6C, 7B+, 7C+ and various other harder variations that go no higher than shoulder height. There is also a 7A which goes a bit higher but all the difficulty is in the first 2 moves so might be ok.
Bullet Roof also at Anston has a 7A, a 7A+, and a one move 7B sitstart. There's also a 7C and a 7C+ that are lowball but dynamic so may not suitable.
All the difficulty in A6 Girls 7C and The Only Way is A6 7C+ at Lees Bottom is in the first 2 moves from the sitstart. Your feet are about 2 foot off the ground when you reach the top hold. Most of the other straight ups might be too high to be suitable.
There's lots of roadside lowballs to the left of Sean's Roof at Blackwell Dale.
Not limestone but there's a few lowballs at Churnet such as In Memory of Mr Fox 7B, Grasshopper Block, Block of Thebes, and lots of low traverses which can be good in summer. I would avoid the Witness block with an injured ankle: the roof may be lowball but the topouts are slopey and have been known to eject people at pace in awkward directions.
If your ankle is really bad, I'm not sure I'd fancy the Meltdown unless you've got some grades in hand. The top's easy but the jugs can be quite slippery and you might want to down climb a few moves rather than drop-off from the finishing hold. Most of the right side of the crag is very lowball.