I know that there are breeders working to produce more healthy pugs and bulldogs but do you know of any resources for finding breeders of other kinds of dogs who focus more on the health of the animals?
Your best bet is going to be word of mouth, learning to read between the lines on breeder websites, or actually getting to know specific breeders and gauging their practices personally.
In every breed, there are breeders who focus on making sure they’re breeding the healthiest animals they can. This manifests very differently in different breeds, as they all have their own respective health issues and health problems manifest with different probabilities for each breed - so what @desertwindhounds considers when planning her sighthound litters is very different from what @crispbean considers when planning breedings for her Japanese hunting dogs. (Both are people I personally consider good breeders who are highly dedicated to responsible breeding and the health of their litters). Not all health tests are created equal, or are equally useful.
I don’t think there’s currently an extant resource for ‘good breeders’ like you’re looking for because of how incredibly political the dog breeding world is. Instead, it’s something you pretty much have to suss out for yourself. It’s important to do some research on the hereditary issues in the breed you’re looking at, and then talk to the breeder about what issues show up in their lines and what they test for. It’s a red flag if they tell you a really common issue has never been seen in their lines, or if they won’t share the health information of their animals.