There are many.
The best of the .30-06 based wildcats have been standardized as factory cartridges for years. There are numerous .30-06 derived factory cartridges, in bore sizes from .25 up. .25-06, .270, 280, .35. If you want non-standardized versions, you can choose from 6.5mm, 8mm, .338, .375, .40. There have been .22s and 6mms made, but with the full length case, they are really badly overbore.
If you don't want to stay with the 63mm case, and standard body taper, the field is wide open, with hundreds of options.