Good idea OP. I am very careful what I watch and read now. I avoid the news, and am pretty close to giving up my TV. I also ration my time online.
Have you tried audiobooks? I had a bad spell of anxiety a while back, and somebody recommended going for long walks or laying in a hot bath while listening to them. (I find podcasts too stimulating when I’m anxious.) I absolutely love them. In fact, they have changed my life - no exaggeration.
Like you I suffer badly with anxiety. For audiobooks, I would recommend P G Wodehouse (read by Stephen Fry), Sherlock Holmes (also read by Stephen Fry), Evelyn Waugh, Dickens and Douglas Adams. I’d also recommend listening to children’s books, especially the Narnia books, and anything by Roald Dahl.
As for films and TV. If you are anxious/low, try:
Jeeves and Wooster (Stephen Fry and Hugh Laurie)
Darling Buds of May (the original, with David Jason)
Actually, I find old BBC comedies help me. Most of them are pretty rubbish tbh, but they are calmer, gentler and more restful than the modern stuff. Porridge, Dad’s Army, Steptoe and Son, Dear John, Hancock’s Half Hour, etc, really soothe my nerves. They also take me back to being a kid curled up on the sofa with my grandparents.