If you want other people to be able to walk up and make a consistent pot, I would recommend a grinder with a digital timed dose/grind. It's too bad the entry Baratzas don't have this. For a little more money than an Encore, the Breville Smart Grinder Pro has similar quality burrs and you gain repeatability due to the digital timer. (e.g. Push a button and get roughly the same amount of ground coffee each time). You'll still spot check with your scale occasionally to make sure your current setting is giving you the desired grams.
If there's already a drip machine in the office, try cleaning it thoroughly (Cafiza-soak the carafe until it sparkles inside and smells like nothing) and try a few recipes using proper brewing ratios and good coffee.-EDIT-
Wait, you found a Vario just hiding in a nook? LOL, that is very lucky. Go with that!! Consider upgrading to the optional steel burrs
, which will give you less sediment in all the brew methods you mentioned (French Press, AeroPress, pour over).