One of these. It's expensive, but it's literally a lifetime purchase. You may have to replace the handle in 20 years, but as a sifter it won't get abused.
I also put a fine layer of sand on my poop board, and use a large flat edge drywall mud scraper, scrape all the poo and sand to the middle of the board and then hold this shovel to the edge, pull the pile onto it. The sand goes through and the poop stays in the shovel. That goes into the manure bucket, then I resand the board.
I almost never have to clean my coop. About once a year, you'll need to bleach and scrub the poop board's edges, but that's about it. And add some sand to replace whatever gets scratched out or sticks to the poo over time.
I also mix in a little Sweet Stall if it gets smelly at all in the summer heat and humidity (but it rarely does).
Once a day I do this process when I collect eggs. Takes 5-6 minutes for 15 chickens to have a clean house every day.
https://www.amazon.com/Mud-Sifting-Square-Shovel-Handle/dp/B08R2DJWGL/