You can marry all of them.
Tesh
Race: Nord
Class: Dual Wield Swords + Archery
Armor/Clothes: Glass Armor
Weaponry: Dual Glass Swords
Location: In a broken down house in helgen
Brin
Race: Imperial
Class: Keeper of the Ways (Doesn't really apply not intended for combat)
Armor/Clothes: Clothes
Weaponry: Iron Dagger
Location: by the creak to the northeast of the lumbermill in falkreath
Notes: She has the book of brin on her
Moya
Race: Imperial
Class: Archer
Armor/Clothes: Glass armor + Clothes
Weaponry: Glass bow
Location: By the Archer training area in Falkreath
Suri
Race: Imperial
Class: All Around Magic
Armor/Clothes: Fur Armor
Weaponry: Magic (expert/master destruction spells + dragonhide and wards (not sure if they will use wards but okay)(
Location: By the waterfall at the northern edge of town
Persephone
Race: Imperial
Class: Keenig (Doesn't Apply not intended for combat)
Armor/Clothes: Clothes
Weaponry: Iron Dagger
Location: Past the lumber mill to the otherside of the river
Raithe:
Race: Imperial
Class: Sword/Shield (Not sure if he uses shields in the books but it's more viable)
Armor/Clothes:
Weaponry:
Location: On the East facing wall 
Nyphron
Race: High Elf
Class: Sword/Shield
Armor/Clothes: Elven Armor
Weaponry: Elven Sword/Shield
Location: Dead Man's Drink (Falkreath Inn)
Sebek
Race: High Elf
Class: Dual Wield
Armor/Clothes: Elven Armor
Weaponry: Dual Elven Swords
Location: Dead Man's Drink (Falkreath Inn)
Techkin
Race: High Elf
Class: Single Sword
Armor/Clothes:
Weaponry:
Location: Dead Man's Drink (Falkreath Inn)
Arion: Race:
Class: Artist (same spells as Suri)
Armor/Clothes: Red Robes
Weaponry: Elven Dagger
Location:
Mawyndule
Race: High Elf
Class: Artist (same spells as Suri)
Clothes: Vaermeni Robes
Weaponry: Elven Dagger
Change Log
V1.1 Added a bunch new characters (ALOT) and minor tweaks