Can landlord oblige to live with another couple?

I currently live in a flat with four rooms. Due to current policies, landlords can't rent this flat to four tenants, so the landlord decided to rent to just two people: me and another tenant. We each have two private rooms of equal size, with the rest as shared spaces like the kitchen, bathroom, etc. The previous tenants have moved out.

Now, there are two qualified tenant options: a Brazilian man and a couple. Both meet financial criteria and have full-time job contracts. The landlord forced me accept to live with the couple since their combined income is higher than a single tenant's. However, I and the Brazilian man have many mutual friends. He has provided proof of past timely rent payments and currently works in an anti-money laundering position. He has also provided his pre-employment screening results and a Dutch criminal record clearance.

I expressed to the landlord my preference to live with the Brazilian man and even guaranteed that if he missed a rent payment, I'd cover an additional two months' rent as compensation, given the two-month notice period for terminating a lease. Despite this, the landlord insists I must accept live with the couple and pay the same monthly rent of 1250 euros + 200 euros for utilities, the same as the couple. Because the couple counts as one person for address registration. If I don't agree to this, the landlord has threatened to ask me to move out immediately.

Do they, as landlords, have the right to do this? How can I protect my rights in this situation?