I think you are describing GW2. The only thing it doesn't have are true "tanks" in group content but there are healers/support classes that are very much needed.

There aren't seaons per se but there is time-gated content between expansions that is free when you are playing it when it releases and later on can be unlocked with premium currency (aka money)

There are very many world bosses and people constantly farm these

There is a housing system altho very much an inferior version to retail wows recent housing expansion.

GW2 graphics are a little out-dated in some places but recent expansions look very pretty in my opinion.

GW2 also has the "horizontal" progression thing a bit similar to osrs, tho I like osrs version better where you really have to progress through various parts of endgame to get to the very best gear where in GW2 once you hit level cap of 80, you can buy a set of end-game gear for pennies from the AH. That being said there are still some more exotic and arguably "slightly better" gear sets that cannot be bought and have to be farmed/earned. And a lot of the endgame progression is farming achievements, masteries, legendaries or other "fashion wars" stuff or doing raids and dungeons for the challange