I would have been perfectly happy if he had, well, retired or something years ago.

I would have been perfectly happy to leave it at that.

He was perfectly happy not to have to face them.

I was perfectly happy with the name I'd had for 40 years.

John seems perfectly happy taking on another student for a week.

I'm perfectly happy to let it go its own way.

If everyone on earth had died but her, she would have been perfectly happy.

Everyone in the library was perfectly happy to let him do his research.

And yet, in that second, I think both of us were perfectly happy.

Others seem perfectly happy to work out during a long lunch.