You could fly non stop around the world in a A345 or 346 with your payload.
You could not. The ranges are still under 20 000 km.
Does the wingspan category matter?
757-200 is popular for VIP conversions, with long range - including VC-32. 767-200ER with extra fuel tanks is a logical choice for a small widebody. And for a long-range small widebody only recently out of production, do not forget A310, either.
747SP, 777, A330 and A340 are in the 60 m wingspan category. Which may matter.
And with the range of A310 or B767-200ER, you may not need 7 pilots as the Worldliner record flight carried... 3 or 4 pilots means 1 or 2 in crew rest at any time.