Two species of barnacles
There are two basic types of barnacle local SEO:
(1) Get a given page for your business to rank well in the organic search results, or
(2) Be at the top of the rankings in a site that ranks well.
I like the example of Yelp:
So one opportunity is to get your business’s page in the organic results. The other opportunity is to rank well within that high-ranking site’s search results (which, again, themselves rank visibly in Google). Ideally you do both.