Brother has a series called Tonerbenefit, but I think it is only available in Eastern Europe. The initial cost is higher for the printer, but the original toner is dirt cheap.

https://www.brother.sk/printers/laser-printers/hl-b2080dw

Sorry I can’t find a page in English.

Before that I used a Canon inkjet with CISS system, but I have always problem with it. It is good for people who prints a lot every day, I mean really lot and do not care if the printer needs some maintenance.

Samsung CLP-310 was the last one you can buy color toner in one liter bottles from Ebay for 10€. Filling those cartridges yourself is messy business. The powder is almost like liquid and stains everything.

BTW. Worth mentioning is that CLP-310 has to be quite new still using its maiden cartridges. Those were chipless and allow only 1000 prints. But you can reset this counter by shorting certain pins and then fill those cartridges 4ever.

CLP-310 motherboard is 45€ on Aliexpress. It might be that by replacing this you can produce a new "maiden" machine. Easy job. I once took CLP-310 apart and then realized that only thing broken was the thermostat on the drum heater, so I replaced that and put everything back together.

I was going to suggest Brother... My last Brother was about 5 years old, and had no trouble with 3rd-party toner carts.