Arthandis

He is equipped with full steel plate sans helmet, a steel mace, a steel shield, and a hunting bow with steel arrows.
Follower can be found in the Bannered Mare.
Marriage is enabled.  It is recommended you have your own home before marriage as his home is technically the Bannered Mare.  You will get Lover's Comfort from the inn bed but you will still have to pay to use it.
Recommended SAM Morph Settngs: (Samson: 38; Samuel: 20; Furball Body Hair Option)
ATTENTION!!
Some people have reported crashing when entering the Bannered Mare.  I am not playing on Anniversary Edition. If you are crashing on AE, you may have to downgrade. Your other option is to load the mod into the Creation Kit, click on the ARTHANGrozhak actor and export the facegen data with F4. You should not have to add the exported file to the mod folder. This is how I fixed the black face bug when I updated.
 
Required
Racemenu
Improved Eyes of Skyrim
Brows
KS Hairdos (only male version is required)
NEXUS VERSION: https://www.nexusmods.com/skyrimspecialedition/mods/51807?tab=description
Credits
Heavy Armored Pants - Circusf18
Improved Eyes of Skyrim - missjennabee and Nazenn
KS Hairdos - Kalilies and Stealthic
Beards - Hvergelmir
Brows - Hvergelmir
Shape Atlas for Men - Vector
SAM Light, SAM High Poly Conversion, SAM Morphs for Racemenu, SAM Light Texture Addon - KouLeifoh

ONLY USE ONE FILE
The mage version specializes in frost magic but does know some fire and shock spells.  The barbarian version is equipped with full elven minus the helmet, an elven greatsword, and an elven bow and arrows.  Barbarian might spawn with a hunting bow which you can just remove from his inventory.

Follower can be found in the Bannered Mare.  Marriage disabled due to voice type.  Feel free to change the voice type to a marriage enabled one for your own purposes.
Required
Racemenu
Improved Eyes of Skyrim
Relationship Dialogue Overhaul - Absolutely necessary due to voice type
KS Hairdos (only male version is required)
NEXUS VERSION: https://www.nexusmods.com/skyrimspecialedition/mods/51513?tab=description
Credits
Improved Eyes of Skyrim - missjennabee and Nazenn
KS Hairdos - Kalilies and Stealthic
Beards - Hvergelmir
Brows - Hvergelmir
Shape Atlas for Men - Vector
SAM Light, SAM High Poly Conversion, SAM Morphs for Racemenu, SAM Light Texture Addon - KouLeifoh