It really depends on what you ultimately want to do for a career. If you're interested in clinical, bio or neuro would be good. If you're interested in doing clinical in a hospital setting, either of those or health sciences would work. If you're interested in social work or counseling, sociology or perhaps the one that you mentioned, "human services", sounds fitting although that one sounds like it could work for other paths as well. Truthfully, there's so much overlap in Psych that any and all of those would probably combine well to some degree, but you can try to fine-tune and focus according to your chosen direction.