You can cross: raspberries , blackberries , wineberries ,dewberries , tayberries , boisenberries ,loganberries , salmonberries ,black caps (which are also called thimble berries) , can all crossbreed .
There is even a "white blackberry" developed by Luther Burbank
The Nothernmost most cold resistant fruits in the world are berries. We should be using the most cold resistant fruits in the world to extend the range of all berries that they can crossbreed with .

will it still be able to make fruit or will they be sterile?

They should make fruit as long as they have the same diploid number . That is 2N X2N OR 4N X 4N FOR EXAMPLE .So just try and see. Good Luck .