I'm trying to find a regex that finds all words that are not within anchor tags. I already have a variant that works quite well, but unfortunately it doesn't work if the tags are nested.

Here is my expression:

(.*?)(\bFoobar\b(?!([^<>]*[^<>]*|[^<>]*)(<\/a|>)))(.*$)

This works, it finds Foobar:

<strong>Foobar</strong> bar baz

This works as well, it does not find Foobar, cause its inside anchor tag:

<a href="foobar.com">Foobar</a> bar baz

But this does not work, it finds Foobar:

<a href="foobar.com"><strong>Foobar</strong></a> bar baz

Thanks for your help.