When the option to provide a cover letter exists, I usually share a PDF “pitch deck” that showcases my value proposition. This typically includes a tailored visualization of my experience and skillset, a competitive overview, strategic business analysis/SWOT, 30-60-90 day plan, etc. Of course this takes some time to develop, but I’m often doing the supporting research as part of my planned interview prep anyway. This approach has yielded a 100% response rate with hiring managers over the past 5 or so years, but I’m outside of the usual HN crowd where talent demand isn’t as high (commercial pharma). I also believe this method has directly led to more attractive compensation packages.
The PDF is not overwhelming - 7 or so slides max with a focus on visualizations over heavy text. It is worth the extra effort if you’re passionate about a specific role or organization.