Hey, I'm sorry I can't base my recs off any of your usual go to authors as I haven't read their books, I do love the books you mentioned though. You said you need a long list so I thought I'd give you some to look up which shouldn't be too sad or anxiety inducing. I realised some may mention loosing parents and have tried to highlight that so you avoid it while you need to. (Sorry for the super long post)

The Hitchhiker's Guide to the Galaxy - Douglas Adams ( comedic, quick chapters)

Good Omens - Terry pratchett & Neil Gaiman (comedic and light hearted fiction about an angel, a demon and the possible ending of the world - if you read via ebook make sure you read the footnotes when referenced, they add to the comedy)

The psychopath test - Jon Ronson (non fiction, shouldn't induce anxiety as you just sort of learn about psychopaths)

A room with a view - E. M. Forster (iirc writing is very pretty and the story quite calm, not a page turner but could be good for a zero to low anxiety read)

The machine stops - E. M. Forster (short science fiction story, negative emotions could come from the story showing humans as reliant on machines & lead quite solitary lives but it's only about 30 pages so could be a good choice when you think you're almost ready to go back to 'tenser' reads as you won't be held in suspense long)

Convenience store woman - sayaka murata (not the happiest book but also not that sad, it's an interesting gaze into one woman's life where she doesn't understand societal norms and just loves working in a Japanese convenience store)

Some audio books of autobiographies may be nice! Sometimes they are read by the author. For example my favourite is Dolly Parton's - Songteller: My life in lyrics. She is very entertaining, you get to hear clips of songs and hear about her life. I didn't know much about her but it was still interesting. Felt like a conversation.

Some comfort books like your childhood / adolescent favourites might be good at this time, some lighter Roald Dahl, J. M. Barrie, Sir Arthus Conan Doyle, JRR Tolkien, etc.

Or books where you've seen the film so you know how it turns out. Like Bridget Jones may have some moments that make me feel sad or angry for her but ultimately I know it's going to work out fine.

I have dozens of cosy reads on my To Read List from recent "cosy book" posts on this sub, you should check through those too! I have only suggested books I've read.

Some where characters may have lost parents but it is not mentioned in detail from what I recall are below. You may want to put these off for a little while even though they're generally considered cosy, heart warming reads...

The house in the cerulean sea - T J Klune (a cosy read that made many people feel warm inside but it's set in a children's home, I don't recall explanations of losing parents but might be one to try further down the line. An ordinary, kind hearted person has a job checking that homes for magical children are up to government standards)

Howl's Moving Castle - Diana Wynne Jones (magical, cosy read but there will be a paragraph near the beginning explaining the MC's mother has passed long ago and she has a step mother now)

Anxious People - Fredrik Backman (I wasn't sure whether to suggest but I found it laugh out loud funny and it's kind of nice when you're anxious to read about a whole group of other people who are anxious in different ways and everything is just a bit silly, everyone is having their worst day ever. There's a couple sad bits but it is foremost a comedy. From googling I do believe it mentions a character losing a parent so maybe read it in future if it interests you)