What printer company sells me a printer and OFFERS me cartridges instead of doing the printer equivalent of a dealer doing his "first one is free" pitch?
Unless things have changed recently, that's Canon. They not only have long been the easiest to refill, but actually are known for working well with third party ink. Continuous inking systems are not very expensive either, and make it trivial to dump in as much third-party ink as you like.
I don't print color, though, so I have an old HP laser, a LJ2300DN with some DIMM upgrades and an additional tray. It has toner cart DRM, but I have a stick-on PCB which you attach with double-sided tape to make a home-refilled toner cart work again. The fix was two bucks. Ethernet, Duplex, feeds 500 sheets before it needs attention. There's even a 500 sheet tray for it which improves that by half again, but I ordered one and they sent me a 250 tray instead so I got that for free and called it good.