What is the most killer SEO strategy to implement?

We all talk about SEO tricks & tips, what Google favours and what it doesnt. Weve all implemented this and that, sometimes that and this. But all in all, what is the most killer SEO strategy/campaign to run for a local business in 2025? What if a client had an unlimited budget for their business and were talking about doing everything we can to get them the sweet #1 spot in their local results? Are you running digital PR, building backlinks, creating new pages? I know it may seem like a broad question and hard to answer but Im still curious if there are certain things that can be agreed on for ranking local businesses above others.