No one is above the grunt work. People know that you understand what they're going through. Anytime the team comes up with an idea or a new concept, the boss presents it like it's his own. Let him come up with his own ideas. No one said a word at the next meeting.
Nothing breaks down teamwork like being co-opted by a selfish boss.
The result - no more ideas and no more team. Give credit to your team. You will get credit for leading that team and everyone benefits. Otherwise, you won't have a team. No idea is created by just one person.