Gunnar came out as the 6th hero. There's a stable under the castle, and plenty of gold. He cleared out resources, tombs, and a couple of artifacts. By turn 117, he had a level 6 building in the castle, a guildmaster, an 8th-level unit, and a lot of potential. On his turn, the opponent surrendered. The reason: the computer had taken the capital on turn 117.
Thanks for the game!