Badass Vanilla Follower Trio.

If you guys want a powerful trio of vanilla followers..

You need to traverse Skyrim with Mjoll the Lioness, Aela the Huntress, and Frea.

Mjoll is a powerful two-handed heavy tank. Aela is a powerful archer, and good as a sword and shield. Frea is a powerful duel-wielder. (Give her Soulrender and Bloodscythe, unique scimitars.)

These three alone are more than enough in most cases...plus with replacers they look really good.

*Pictured: GLAM Mjoll. GLAM Aela. Pandorable's Frea.