Skyrim Essential starter mods

You can grab all of these at the Nexus.  I'll post the links once I can post them.

SKSE  
BOSS
NWM
Interesting NPCs
Immersive iHud
Guard dialogue overhaul
SKYUI
Climates of Tamriel
Quality snow HD 4k
Ethereal elven overhaul
aMidianborn book of silence
Enhanced lights and FX

Deadly Combat for me is essential, due to timed blocking/timed warding mechanics, also Convenient horses - essential if you use mounts. Those two definitely can't live without.