Plain paprika is probably the best bet, perhaps with just a touch of smoke flavoring or smoked salt. If you are looking for a spicy dish, cayenne pepper or chili powder can both be used sparingly to add a touch of zing.
Butter, margarine, shortening, melt and let cool. For most things, fat is fat and will produce pretty much the same product. This works for replacing oil, the reverse is not always true. You wouldn't...