........Hrm.
The Leader: A human jarl or the son of a jarl (so a king or a prince), charismatic and fairly clever, but also a very skillful warrior and sea captain.
Fighter 8 with 2 levels in other stuff; either Rogue, Marshal, Barbarian, or 1 level each in two of those (1 level of Barbarian could boost his speed to keep up with folks while in medium armor). Ability scores: above-average for the most part, with Constitution and Wisdom closer to average; he's tough but not a brute, and he relies on the priests of Woden for wisdom and guidance. WF, WS, GWF, and IC for the longsword, carries a heavy shield, and wears a breastplate, possibly a result of plunder. Probably carries a longbow just in case, but isn't as focused in its use. Take any relevent feats from the PHB, PHB II, CW, etc.; I don't recall if Einhander is available or not at this level, from PHB II?; make him really skillful in both offense and defense.
The Brute: A human, dwarven (dvergar), or half-orcish (orichar) berserk, devoted to Tyr, Thor, or Woden, very brutish in disposition but loyal to his clan and a good hunter/tracker.
Barbarian 4/Fighter 4/Bear Warrior 2, or Barbarian 7/Bear Warrior 3, or Barbarian 4/Fighter 2/Bear Warrior 4. Ability scores: Strength and Constitution top priority, Dexterity of secondary importance, and everything else unimportant except for having a bit of Wisdom or Charisma. Focused on using the greataxe, carries no shield and wears hide armor (a bear pelt). Should have the Track feat along with the Power Attack/Cleave/Great Cleave chain, along with probably something like Extra Rage or Intimidating Rage, and possibly Weapon Focus and Improved Critical in the greataxe (and Weapon Specialization, if going for a build that includes 4 Fighter levels). Might instead have WF and WS in claws or something, if expected to shift into bear form frequently.
The Clan Historian: A human, elven (ljosalfar/lios alfar), or half-elven (alfmann, or alfarmann?) skald, dedicated to Woden or Freya, intelligent and clever but still a reasonably capable warrior.
Bard 6/Fighter 4, or Bard 8/Fighter 2, or Bard 6/Fighter 2/Rogue 2. Ability scores: Strength, Intelligence, and Charisma should each be above-average (13+, preferably 14+), while Wisdom should at least be close (12-14), Dexterity and Constitution should be average or a bit lower. Probably has Improved Toughness feat from Complete Warrior to make up for relatively-poor Constitution as a warrior-type, along with Weapon Focus (and, with Fighter 4, Weapon Specialization) in the longsword to be capable in melee combat. Other possible feat choices would include Combat Expertise, Improved Disarm, Improved Initiative, or Skill Focus.
Wields a longsword in two hands, relinquishing one hand from the grip when needed for spellcasting. Wears a chainmail shirt and carries a longbow or shortbow just in case, though he's not especially good with it. His spells should be focused on subtle augmentation and maybe a bit of trickery, as well as divinations, which are important. He's likely to cast Cat's Grace and Haste (the former just before things get dangerous, the latter once battle is joined), then begin shouting a war chant, stirring epic, or rousing ballad as he fights (Inspire Courage).
The Spiritual Advisor: A human, elven, or half-elven mage-priest of some kind (I don't recall if there's any specific term for them that fits/applies), the wise man, diviner, and such, but also a halfway-decent warrior, devoted more or less equally to Woden and Frigga.
Druid 6/Fighter 4, or Druid 5/Wizard 3/Mystic Theurge 2, or Druid 3/Wizard 3/Mystic Theurge 4, or Druid 3/Fighter 2/Wizard 3/Mystic Theurge 2. Ability scores: prioritize Wisdom and Intelligence, with Charisma at least average or a bit above average (12-13 preferably), while Dexterity should be least important, so emphasize either Strength or Constitution depending on build; Con if going with more druid levels for Wild Shaping into black bears and such, or Str if emphasizing combat in humanoid form. Will use a spear in combat, emulating Woden's gungnir, using no shields and wearing either no armor (if multiclassing in wizard) or leather armor. Will utilize Mage Armor and Shield, or permanent magical enhancements on their leather armor, as appropriate.
Spells will otherwise focus on divination, augmentation (Bull's Strength, Cat's Grace, and Bear's Endurance will all be useful, and minimize the amount of magical gear they'll need for ability score buffing), and dealing with animals, plants, and weather to some extent. Probably little or no flashy stuff, but Sleet Storm, Stinking Cloud, and Obscuring Mist just might be reasonable for some battlefield control. Keen edge and Haste may be good, and they can probably use Slow and similar spells to curse their enemies. Animal companion will be a heavy horse, and feats will probably focus on mounted combat; might include Mounted Combat, Ride-By Attack, Spirited Charge, Weapon Focus (Spear), and such, also perhaps Improved Toughness. If going for the 4 Fighter levels, also taking Weapon Specialization (Spear). Natural Spell should of course be taken if going with 5 or more levels of Druid. Familiar, if taking Wizard levels, should be a raven of course.