For acquisitions editors at publishing houses and agents alike, always research what they are asking for and give them exactly that. Often it’s only that one-page query.
For those who want a query plus author bio or query plus synopsis, savvy authors who have already written their book proposals can just cut and paste the appropriate section out of their proposals and print it off as an additional page that goes with the query.
Part of giving them what they want means not giving them what they don’t want. Check their guidelines to find out if they take fantasy but not steampunk, mystery but not cozy.
Save yourself a lot of time and waiting around. Check first, and you’ll move ahead more quickly.