Cunard’s Queen Mary 2 is all that’s left of the oceanliners (As Janet from the Good Place might say, “not a cruise ship!” ;) she’s built to handle the North Atlantic weather.
If you’re lucky enough to be able to fuck off for 42 days you might also be interested in ocean crossings by sail, here’s the offering ive considered, the Europa: https://www.barkeuropa.com/en/our-voyages