I have (or had) a koss deck saved a few days ago i found a build for off the net. It ran rather well but was a bit more zombie oriented.
A few cards that was teched in there were like.
1 Book of life (Helpful revival card and rfp something important from the opp. grave)
2 Next to be Lost (Nice card to dump things you need quickly, like more skull servent's; in my case i've actually chained it a few times to mezuki after getting heavy'd to get some grave revival over more koss power)
1 Archfiend Zombie Skull (I'm surprised i was able to get this out a few times in some duels; but once i did, it made my field hard to get rid of
)
Anyhow, it's a fun deck to mess with, Just at times can be a tad difficult to be competitive if you can't dump cards fast enough or get the occasional dead draws.
P.S- I love zombie's also, but I love fiends//dragons a tad bit more,xD