I've written a userscript[0] before regarding official websites and I feel this is the hierarchy you should be using:

1. Try getting the Wikidata "official website" property

2. Then any link inside of a {{url}} template or |website= in an infobox

3. And if you really want to try to get something to resolve to, the first site wrapped in {{official website}}

If you need code to reference: https://en.wikipedia.org/wiki/User:Opencooper/domainRedirect...

[0]: https://en.wikipedia.org/wiki/User:Opencooper/domainRedirect