The aircraft that flew the last mission of WW2 (and unfortunately suffered the last fatality - Sergeant Anthony Marchione), the Consolidated B-32 Dominator. Just as the B-24 had a longer range than the B-17, the B-32 had a longer range (and more speed) than the B-29 despite having the same engines - a function of the "Davis Wing" [Only later was the reason for the Davis wing's performance properly understood. Largely through accident, the shape maintained
laminar flow further back from its
leading edge, to about 20 or 30% of chord compared to the 5 to 20% managed by most airfoil sections of the era. ]
https://en.wikipedia.org/wiki/Davis_wing However, Consolidated had problems with the pressurization system, ultimately scrapping it and thus was limited to a lower altitude than the B-29.
Only 118 aircraft were produced and all were soon scrapped after the war. On 18 August 1945, two B-32's were flying surveillance over Japan when they were attacked. Although both aircraft survived, one was severely damaged and lost a crewmember. The next day, Allied forces began taking the propellers off all Japanese aircraft.
Good article detailing the mission from The National Interest.
The last Dominator was scrapped in 1949, leaving little evidence behind of the aircraft type that had embarked on that fateful last mission over Tokyo.
nationalinterest.org
Also from War History Online
Many history buffs will be familiar with the B-29 Superfortress, which is perhaps best known as the aircraft which carried the atomic bomb during the
www.warhistoryonline.com
Prototype started with the same horizontal stabilizers and rudder setup as the B-24
“Hobo Queen II” of the 386th Bomb Squadron, 312th Bomb Group