Hence why I said most. Which should make the unhappy ones more jarring.I am not sure Finwe would describe his first marriage as having a happy ending.
Curufin and Fingolfin wives refuse to leave with them and I doubt this was a happy parting.
Gwindor and Finduilas weren't yet married, but they were engaged and that didn't end well. Though for the most part, they do seem to have been happy marriages.