Buffy the Vampire Slayer. Nothing else even comes close.
I never actually watched the show while it was on. But in 2003, I had a horrid psychological breakdown from going 28 years with OCD and not being diagnosed or treated. I think I've gone into some detail about how scary the situation was and how hopeless it was. And I sort of lost connection with the world.
And what brought me back and helped me was Buffy. I was curious, I bought the first two seasons and binge watched them in a couple days. It made me feel good and positive for the first time in months because Buffy is a truly good person and she always wins. It really helped