The downfall of this achievement is the requirement of 100% on vocals. other than all talkies songs, only 1 song has been 100%d on vocals, which is pretty vacant, and only like 2 peopl have done so.
The only on disc song that has talkies is the already mentioned No Sleep til Brooklyn. On Broken Glass and Grave of Opportunity are part of a free DLC pack, but those are incredibly difficult on all other instruments, even on Hard.
Debaser, on the other hand, is a good alternative if you can't get a hold of someone who has a hang of the slider notes on NSTB and you have a decent drummer. theres only really one hard fill, and its lightyears easier on H than X. If you can find a good drummer who can tackle it down, itll be money well spent, as the song is all talkies, and the guitar and bass charts on H are absolute cakewalks.
DO NOTE that Debaser is part of a DLC pack that requires money.