I don't know about you, but personally, as a warrior hero, I really like Helmar. Besides Light, he doesn't really need any other magical perks... or rather, he doesn't need them. The build suggested by Shogun suits him perfectly. However, Leadership can be replaced with Luck, Education, or Logistics, depending on the situation. In the first turn, the hero casts Haste/Stone Skin, and in a pinch, Divine Strength, and automatically, most of the stacks will be affected by a powerful attack at the Skilled level. This is a good boost to the army, especially against such a dangerous enemy as an Orc. Another advantage of Helmar is the guaranteed Light skill (after all, it doesn't always drop) and some help with the powerful attack at the start. Of course, he's not Ingvar, Ibba, or Karl, but nevertheless, he's still a great Dwarf. In general, you can not worry about it and take Ingvar initially, and if the guild gives you Helmar, then give him the Dwarves and make him the main hero.