Enemies and regular mobs can spawn anywhere within a 20 meter radius of workbenches, fires, wards, and torches. If you are looking to build something like a city or any other large build you need to space out workbenches so that their crafting rings all overlap to designate all that area as 'base' and prevent spawns.

After you have confirmed that there is no 'deadzones' that aren't covered by a workbench's build radius you can then leave them, or replace them with something like a standing torch or campfire. If done right, you should no longer have ANY mobs spawn within your village including deer, boar, or greylings.