Oki Makes some of the most open printers I've seen. Many of their laser printers still support older dot matrix standards (which just about every OS supports) as well as more modern standards like PCL and Postscript. You will pay more for them, but there isn't a printer manufacture out there with more open standards, and their Tech Support in the off chance you have an issue with the printer is second to no one.
If your OS support any Oki at any age, it will print as long as it knows what port to print to, Especially parallel and LAN. Hell, I've used 15 year old Okipage 8C drivers on modern Oki color lasers, Dot Maxtix DOS drivers on Monochrome lasers, Hell, I used an HP 4000 Driver on a Oki B430dn when the 4000 failed at a critical time and they still printed no problem.
I can't vouch for the latest printers, since I haven't touched an Oki since my last job, but Oki was the best decision I made there. We had B430DN's all over the place and they would outlast anything in their price class. We had multiple 430DN's with cycles over 120000 pages with virtually no issues. New aftermarket toner carts were as low as $20 for 5000-7000 imprints. The only issue I had with them was their drum, which had a 20000 Page cycle, and you had to buy an original drum at $150 since the referbs were junk and would grind up at 7000, although the printers new were as low as $130 so we just buy a new printer and you could usually reset the drum in maintenance mode so you could get another 20000-40000 out of it before it would artifact. Even with the drum costs in play at the recommended intervals the cost per page was ridiculously low vs anything in the same price class.