lore question regarding first war

[kaos99]

im making first war themed maps but i want to add more units than just those from wc1 but i want to stay true to the lore.
im thinking maybe ogres for the horde as some sources say ther were, alliance idk

my question: which classes were trained by the horde and kingdom of azeroth during the first war besides those that were in wc1?

btw, i already hav assassin/spymaster as an orc hero and some other classes/titles as heroes eg Knight-Champion, Warlord