Literary fiction on the happier side?

I have a very easy time finding captivating literary fiction that is dark or melancholic, but I've realized recently I struggle a fair bit finding more generally uplifting works. It got me wondering what I can do to change my reading habits a bit, As much as I love my strange grim novels I feel like I must try to keep a varied diet, it can all get a bit intense after a while.

Are there any literary fiction works with a generally happier/brighter tone that retain the excellent prose and are thought-provoking? Obviously literary fiction is multifaceted by definition, often tackling difficult and uncomfortable topics and feelings, never uniformly positive or negative, serious or silly. I know, please don't try to argue over definitions, I hope my question is still understandable. Could George Saunders be a solution, for example? How about Proust?

Some of my favourite authors include W.G. Sebald, Roberto Bolaño, Clarice Lispector, Thomas Pynchon, Sylvia Plath, Kazuo Ishiguro, Mark Z. Danielewski.

Thanks in advance!