Another vote for a dual base router. If you can only have one, the plunge base is the way to go, but the kits with dual bases are better, in my opinion. My multi-base router is a Porter-Cable 690, which is kind of on the small side. Still, I used the stationary base under a router table for a couple of years, and the plunge base (and D-handle base, too) for the handheld stuff. I've since upgraded my router table router, but still use the 690s (I've got two motors) for handheld work. I've not used the Milwaukee routers, but they're very highly regarded, and I haven't used a Milwaukee tool I didn't like.
Some of the guys who use routers more than me may offer other good brand suggestions, too. There are a number of really good routers out there.
Regarding some of the other tools mentioned...
I almost never use my jointer when I'm doing flatwork, but here again, it's because I've got a good, accurate tablesaw that I can get glue-ready cuts with. But the caveat is that I almost never buy lumber that's not at least surfaced on one edge, if not both. If your local supply is rough lumber, then a jointer (and planer) would be higher up on the list than for me.
My bandsaw is the second-most used stationary tool in my shop, but that's because I'm primarily a woodturner, and I use it a lot for rough-cutting blanks. When I'm doing flatwork, there are some projects where the bandsaw gets no use, but there are others that couldn't have been done without one.
Random orbital sander? Yes, for sure. I use one of my three (2", 5", and 6") on pretty much everything I make, round or flat.
Of course you could save yourself a lot of time and money and just buy yourself a lathe from the get-go. Then you won't be needing all these flatwork tools. Just a whole slew of woodturning tools instead.