From this table, it is clear that the fastest hero on the first day is Moner (1936mp).
Next:
Kirr (without dwarves) - 1878
Dessa (without orcs) - 1801
Pyra (without golems) - 1793
Tyraxor, Lorelei, and Piguegram (always) - 1760
Any hero from Conflux (without water elements) - 1760
Gunnar (in any case)