Hi Dakota_G,
This is a good topic and you've come up with some good ideas to get started on your content development. You might find some of the suggestions in this article useful, as well: https://placester.com/real-estate-marketing-academy/real-estate-local-seo-tips/
Competing with a company like Zillow, if you are marketing a small-to-medium realty firm, may not be a realistic goal to set, at least not for the top search phrases you'd probably most hope to rank for. You may need to think of sites like that as places to get listed rather than to surpass in the SERPs for core terms.
So, where does this leave a company like the one you are trying to market? Typically:
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Competing for longer-tail searches
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Competing for something other than the "10 blue links", like featured snippets, video results, image results, local pack results, etc.
Some of the ideas you've had, like providing weather results, are probably not going to be worth your time. People already have apps for that, or get their info on that right inside Google's results. But if you can come up with the best possible answers for questions that people are asking and that haven't already been covered with a perfect answer by a huge powerhouse publication, you might be able to start seeing some more visibility.
I would identify long tail terms that directly relate to your geographic and industry market. Do the searches for these terms. See what comes up. Look at featured snippet opportunities, People Also Ask boxes, Answer The Public, Google Q&A queries, Quora topics, etc. I'd begin gathering direct feedback from your firm's clients. What are their FAQs? Investigate FAQ schema to answer these queries.
Finally, I would look at those top sites that are outranking yours and see if there are opportunities for you to be interviewed by them as an expert, to be listed on them, to guest post on them and similar activities so that you at least have a presence on platforms you can't surpass.
I hope these suggestions help.