Hi there and welcome!
A general seasoning (call it a rub if you like) that works for grilling, smoking, oven roasting, etc. is a sensible coating of what I call the BIG 4 seasonings:
- Garlic Powder
- Dehydrated Onion or Onion Powder (use one or the other, whichever is most available for you)
- Black Pepper
- Salt
With the BIG 4 you will be amazed at how simple it is, how inexpensive, and how good it makes meat taste. Try it with a steak, a pork, chop, chicken, a hamburger, etc. and prepared to eat well. Fish may be the one meat where you can lighten up on the garlic and or onion but it doesn't really hurt it.
If you look at most rubs or premixed seasoning packs the top 4 listed ingredients are usually the four I mention.
Additionally, if you start with the BIG 4 you can go pretty much any seasoning flavor style you want with just a few more seasonings, for example:
- Mexican, or Tex-Mex - BIG 4 plus some Ground Cumin and Chili Powder and sometimes some Paprika
- Italian - Big 4 plus Basil, Oregano, and sometimes a little Thyme or Sage
- Cajun - Big 4 plus Paprika, Cayenne Pepper, Thyme, and sometimes some Bay Leaf
- Soups - Big 4 plus some Thyme, Celery seed, Bay leaf, and/or other spices based on your soup dish
- BBQ - Big 4 plus some Cayenne Pepper, Brown Sugar, and sometimes some Paprika
The possibilities are endless but as you can see the BIG 4 are almost always a part of the mix
and are amazing on their own.
I would like to recommend you give it a simple try with some ground meat you are browning for any recipe. Just add the BIG 4 to your ground meat while you brown and taste. Many recipes never mention to season ground meat while browning and I feel it is an absolute misstep.
I can't speak highly enough of how simple and tasty the BIG 4 are. My steak seasoning is BIG 4 plus a little cayenne pepper.
For grilled pork chops and chicken I go just the BIG 4 and am always amazed at how such a simple mix creates such amazing flavor!
I hope this info gives you some food for thought and helps stack that spice cabinet