There are many great armour sets out there. I obtain followers just to see the armour in action.
I used Wolf Armour (regular and then remix) for about 30 levels and have recently moved to Silver Dragon Armour (pictured with dragon helmet and Dragon Priest Mask (not sure which I like best)).
Some of the other really good looking armour IMO is the Blood Witch armour (I dress Saadia in it as a dual wielder - pictured), the Royal Armour of Aragorn, Seltkirks Armour (the darker version), Gondorian Ranger Armour (I had to fix the armour ratings on that one), the standalone Nights Watch armour (not the one included in the big Game of Thrones Companion mod, although that is good too), and the Kingslayer armour.
Others I like the look of but don't wear includes Geralt's Heavy Jacket armour (male only and all of my followers are female), Matys Mithril armour and for a long time my followers were dressed in the Sabre Cat armour.
(of course, credit to all the authors of these great mods).
Cheers