The is a mixture made by Goya products called Adobo, it contains Salt, Garlic, Oregano, Black Pepper and Tumeric. I have used on loins, Chicken, Turkeys etc. My wife and really like it. I'll use that and just rub some Hungarian paprika on the loin (and pretty much anything else) and it will usually come out well. There are some other Cajun style rubs that I have made up but I can't find what I did with the recipes. If I can find them I'll post it. But the Adobo is good for being really lazy, it comes with or without pepper.
I pretty sure there are people on this forum that have their own special rubs that are out of this world.
So good luck.