I'm experimenting a bit with something similar for summer, I've got something pretty good using:
3KG Maris Otter (65%)
1.75KG Pilsner (30%)
250g Torrified (5%)
40G Target (at 60)
100G Saaz (split 10, 5, 0)
For a 23L batch
I've used US-05 but I suspect there are alternatives which might be...