Historically significant aircraft for FS

What are your favorite historically significant aircraft that (to the best of your knowledge) aren't available for addon to Flight Simulator, or simply have not been well represented in available versions? To make the topic useful, if anyone sees a mention on the list that is available please direct us to it.
Based on my previous post, my #1 has to be:
Voyager, Burt Rutan's genius creation that was the first airplane to fly round-the-world without refueling.
#2: SR71, record holder for speed and altitude records for non-rocket powered aircraft is available as freeware and is beautiful, but the flight model could use a bit of work.
Based on my previous post, my #1 has to be:
Voyager, Burt Rutan's genius creation that was the first airplane to fly round-the-world without refueling.
#2: SR71, record holder for speed and altitude records for non-rocket powered aircraft is available as freeware and is beautiful, but the flight model could use a bit of work.