What is the most lore friendly face mod?

One that gives identical faces to the original vanilla faces.

None, only vanilla can offer faces identical to the vanilla faces.
Hur Hur

Westly's new replacers.
Found here: http://www.gamesas.com/topic/1340173-westlys-head-packs-and-headhair-replacers/page__fromsearch__1

You want the Pluginless Replacers at the top.

Yep, there's nothing closer to vanilla than Westly's.

They look great!

Unfortunately it seems he hasn't done Dunmer yet.

Anyone one of a good replacer for Dunmer heads?

I've never had a problem with Better Heads, or Vvardenfell Visages, or Emma's heads (I use a custom build that uses a bit from all three)

Check this thread for making decisions: http://www.gamesas.com/topic/994490-the-npc-head-replacer-comparison-thread/

Better Heads gets the job done for me. Nothing too over the top or fancy.