I'm self-centered enough to notice things that are in some way like me, so I will watch and remember shows that click, and will have mainly Gamma references.
Impression of Supernatural mid-season 1 is that Sam is INTJ, Dean is ESFP, thus, main cast Gamma.
There are all sorts of references in Game of Thrones, but Gamma is Arya Stark, Jon Snow, Ygritte(?), Theon Greyjoy, Jaime Lannister, Tywin Lannister, Roose Bolton, Daenerys Targaryen.
Tyrion is Alpha, probably also Catelyn Stark.
I've seen PowerPuff Girls typed as ENTJ, ESFP, and IxFP, though that's up to debate, but thus Gamma.
Stranger Things is again a mix, but has plenty Gamma - Eleven (ISFP), Jonathan (ISFP), Steve (ESFP), and I've seen Nancy typed all over the place, but some say ENTJ. I don't have an opinion on her. Lucas is 100% Delta.
Xena the Warrior Princess herself is Gamma, but I would say the overall impression of the show is probably Delta, as is Gabrielle.
I'll add when I think of more. Feel free to challenge what you disagree with, or add argument if you do agree.