Praise be to GURPs! It's unfortunate that there seems to be a persistent sentiment that DMs should be making snap arbitration on a large variety of systems instead of having a rule-base that you can ignore when it gets in the way of your storytelling.

GURPS does this some much better because it does have rules for almost any genre and style you want, letting you have professionally crafted rules that have been playtested and matches to the genre they are designed for that you can use either way.