The best replacement for cyanogenmod is stock.

The best alternatives to cyanogenmod are rated as following:
★★★★★  stock
★★★  aokp
★★★  miui
★★  paranoid android
★★  touchwiz
★★  bugless beast
★★  omnirom
★★  stock nexus 5
★  kitkat
★  carbon
★  slimkat
★  aosp
★  clockworkmod
★  stock nexus 4
★  liquidsmooth
  stock android
  stock nexus 7
  xposed
  jelly bean
  nightly
  oxygen
  pacman
  leedroid
  slimbean
  sense 5

Your alternative for cyanogenmod is not listed? Suggest!
Speaking about cyanogenmod, one probably shouldn't forget about gapps.

Other search terms related to cyanogenmod and their ratings are:
★★★★★ gapps
★★★★★ twrp
★★★ google play
★★★ factory reset
★★ xposed
★★ wifi calling
★★ play store
★ kies
★ galaxy gear
franco kernel
You have in mind a companion for cyanogenmod and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cyanogenmod in all years. Click on graph for more.
cyanogenmod
stock
aokp