Arghhh. . . . . OK, I'll explain as best as I can.
I don't worship a pantheon, no. I worship the "Dark" gods and goddesses of various pantheons. Dark simply means they have an affinity to things such as the Underworld, Night, and such. Examples would be Morrigan, Anubis, Hecate, Osiris, and such.
The "Dark" Pantheon, I guess you can call it. I practice various forms, including simple rituals to larger, more complex rites.
You are again misinterpreting Darkness with "Evil". I assure the two are separate things, lol. For example. Animals of the Night such as raccoons and wolves. Do you say they are evil??? Absolutely not. Owls come out at night. Are they evil??? Absolutely not.
The same applies to people. Darkness DOES NOT mean you are depressed, unhappy, angry, spiteful, hateful, or evil. Think of Darkness on the exact terms as you would Light. The word "Dark" is always associated with NEGATIVITY. Actual darkness, has NOTHING to do with negativity, trust me on this one.
I doubt you would ever associate Light with negativity. If not, why associate "Darkness" with it??? Open your mind. It is but a word.