Make your own?
Of all the things to do in cooking, mixing some salts and spices together is the easiest thing to do and hardest to screw up.
Beef is easy: Salt, black pepper, and savories (onion and garlic powder). If you're looking to replace a store-bought "steak seasoning", this is it. 99% of steak seasonings are salt, pepper, onion, and garlic. When cooking beef you want that beefy flavor to be there, so look to enhance the beefiness, not override it. Add whatever you want, but not sugar. Beef needs sugar like a cow needs a wolf.
Pork and chicken are more broad: Yeah, you can use the same rub you use of beef, but chicken and pork have a more bland pallet to begin with so you can go crazy creating flavors instead of enhancing existing ones. Chicken and pork love sugar too, so you should really make a second rub. Salt, black pepper, sugar (brown or white), and paprika (for color). Add from there. Just like beef, savories do great here too, but so do cumin (southwest flavor), ground chilis (ancho for earthiness or chipotle for spiciness), mustard powder, or whatever else you want to try. The world is your oyster here.
