'would be comfortable' is correct and usable in written English. You can use it to express a hypothetical or future state of being. For example, "If I had enough money, I would be comfortable."
No one person would be comfortable with 4.5 million human beings actually following them.
Thus Mars, with an albedo of 27%, would be comfortable.
"It's a question of whether it would be comfortable.
"I would be comfortable with the editor's comments," she said.
But Vreeland probably would be comfortable with the divine.
We promised her death would be comfortable, eased by morphine.
Best of all, you would be comfortable doing it.
Williams said the Nets would "be comfortable" with Frank as coach.
It seems as if they would be comfortable with the status quo.
Being easy on eggs meant it would be comfortable for humans, too.
What woman would be comfortable with pronouncement-prone Abigail looking over her shoulder?
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK