There’s a great Facebook group called baby wearing UK who will have plenty of recommendations for you 😊
I like the Tush Baby with the attachment. My daughter has been at the 99th percentile since she was born. This is the only one that doesn’t kill my back and that she actually likes.
https://tushbaby.com/products/the-snug-attachment
The top two are awful carriers from what I’ve seen on baby wearing UK group
Tula grow with me or Tula explorer are meant to be amazing, you can get them on vinted for cheap
My boy is chunky too. I am using this one. I had a wrap carrier but it was annoying. This one’s been a delight and I love that it’s soft on my lil man’s skin. https://amzn.to/4f8mOHK