Accomplished? Surely you jest.
@KSM Oof! I feel like I'm waiting on a table.
With rubs I always lean towards what mainly works well with beef, but is acceptable for pork or chicken.
This should provide you with some kick. I'm just going to put some minimal measurements next to the ingredients. Not sure if you'll like it but if you do you can multiply into a bigger batch. If you don't like it then you won't have much waste. Those chili powders and mustard powder aren't cheap.
Coarse salt ~ 1/2 cup
Brown sugar ~ 1/4 cup
Coarse pepper ~ 2 tablespoons
Granulated garlic ~ 2 tablespoons
Onion powder ~ 2 tablespoons
*Ancho or *Chipotle powder (go with Chipotle if you want more heat) ~ 2 tablespoons of either
Mustard powder ~ 1 tablespoon
Oregano ~ 2 teaspoons
Thyme ~ 2 teaspoons
Cumin ~ 1 teaspoon
*If neither appeals, use Smokey Paprika. You could even add it to the mix.
If you have a Penzey's Spice store near you, they'll have everything. Grocers are hit or miss. I also recommend Colman's mustard powder. The other brands lack flavor.
I went by memory because when I quit the business I irrationally threw away all my recipes. Mid-life crisis I guess.

You have the chops though. I know you'll make adjustments to your personal taste.
Cheers man!