With antecedent as object: whom.
With antecedent as subject.
What person or people; which person or people; asks for the identity of someone; used in a direct or indirect question.
Whoever, he who, they who.
A person under discussion; a question of which person.
whose
You (singular); used emphatically, especially to indicate exclusiveness of the referent's participation in the predicate, i.e., that no one else is involved.
Your own self (singular).