I think that this is very campaign-specific, because the choice of portfolios shows what is important to your world.
Some pantheons have portfolios determined largely by alignment (and the stereotypes therof). Such a pantheon might have a LG knight, a NG healer, a CG ranger/scout, a LN judge, a N wizard/contemplative/sage, a CN trickster, a LE tyrant, a NE assassin/god of death, and a CE slayer/barbarian/madman.
Others may be based on class archetypes. Deities and Demigods, for example, mentions this as a major design principle. In that case you might have a god of fighting/killing (barbarian, fighter, paladin, ranger), nature (druid, ranger), stealth (rogue), contemplation (monk, sorcerer, wizard), magic (sorcerer, wizard), and so forth.
Others may decide that some other principle is the important split in their game and go with that. For example, I could imagine a pantheon based on the elements (fire, water, metal, wood, wind; fire, water, earth, air). The fire god may be a god of destruction, worshipped by barbarians and evil wizards; the god of metal might be a god of building and technology, etc.