Most go-to would be Die Hard Dice (Elessia line w/ gold or black numbers; I like this font esp.), as well as Infinite Black (Elder Sign Green d6; this is for when I happen to run Vaesen).
For the former, if you find you also like this font, you may want to check out their Rerolls line which are recycled; also can not praise their purchasing/customer service more highly.
For the former, if you find you also like this font, you may want to check out their Rerolls line which are recycled; also can not praise their purchasing/customer service more highly.