Using Shared Page for Multiple Reports

Without going into too much detail, we have an overall format that we use to build reports for our sales reps. Some of the tabs have to be specifically customized for the rep, but others (such as a company leaderboard) are identical for every single rep / report. I would love it if I could just make a report that contains these various "fixed" tabs, then display them on each Dashboard as almost an embedded report. If I need to change anything, I could then update these fixed tabs instead of having to update each report separately. I am open to suggestions if my original request isn't possible, thank you!