Made a version of this list three years ago. Since then more pantheons have been added, some of my previous picks have been added, and I have learned about new gods. So here is an updated list.
Greek: Hecate- Goddess of Witchcraft
Role- Mage- Mix up skills to keep enemy guessing
Norse: Vidar- The Silent God
Role- Assassin- Speed and Travel focused
Hindu: Sarasvati- Goddess of Knowledge
Role- Mage(Support)- Gives out buffs based on party progress
Roman: Flora- Goddess of Spring
Role- Mage(Support)- Healing
Chinese: Tu’er Shen- The Rabbit God
Role- Assassin(Support)- Gives buffs the longer he stays hidden
Mayan: Yum Caax- Lord of the Woods
Role- Hunter- CC and range
Egyptian: Wepwawet- Opener of Ways
Role- Warrior- Self buffs and bonded buffs
Japanese: Kagu-Tsuchi- God of Fire
Role- Mage- Area of Effect damage
Celtic: The Dagda- The Good God
Role- Guardian- CC & Party Support
Slavic: The Zorya- The Star Goddesses
Role- Mage- Buffer
Voodoo: Agwe- Loa of the Seas
Role- Hunter- Burst/Splash damage
Polynesian: Paka’a- God of the Wind
Role- Guardian- Barricades area to lock out enemies.
Arthurian: Tristan- Knight of the Round
Role- Hunter- Crit/Speed build
Yoruban: Anansi- The Spider of Stories
Role- Hunter- Trapper
Lovecraftian: Hastur- The King in Yellow
Role- Mage- Debuffer
Mesopotamian: Nergal- God of Plague
Role- Warrior- Damage over time focused