Maui Sails and Gaastra. Severne RDM are also Hard top (around 10% bend curve), but their SDM masts are closer to the traditional 12% Constant Curve (or average bend).
Flex top: Neil Pryde, and Tushingham SDM masts. Maybe also some of the Hot Sails Maui.
Average, between 12 and 14% include Simmer, Goya, Sailworks, GUN, Aerotech, Powerex, Amex, North Sails, Naish (at least SDM) etc.
As long as you you match mast and sail within the same group of flextop/average/hardtop you should be fine. And masts typically survive many sail generations!