Horror fans help me out!

You're right and i do these kind of searches often, the problem is that for instance "best horror movies of 2005" also lists Constantine and similar movies, having already seen it i know it's not a horror movie. But there are a lot of movies on those lists that are barely horror let alone good horror movies. These types of searches often give me results that are closer to "all the horror-ish movies of 2005". I've actually spent a considerable amount of time watching horror movies lately and it's getting harder and harder to find one that has that special feel to it, and sticks with me after. Most are just generic and bland copies of copies of copies. I really liked the vvitch for instance, it wasn't scary per se but it was really unsettling and it stands out among other recent movies...

I'll second "You're Next" (2011), all you need to understand about it is that it's not so much a horror/com as it is horror/black humour film.

Here's some films that I thought were at least decent since 2000:

May (2002)
Krampus (2015)
Shaun of the Dead (2004)
The Descent (2005)
The Host (2006, Korea)
Don't breathe (2016)
It Follows (2014)
Pandorum (2009)
28 Days Later (2002)
Dawn of the Dead (2004)
The Devil's Rejects (2005)
Final Destination (2000)
Saw (2004)
The Mist (2007)
Slither (2006)
Trick 'r' Treat (2007)
Insidious (2010)
The Others (2001)
Let the Right One In (2008, Sweden)

i've seen You're Next and I loved it. Not exactly what I would called horror, thriller maybe but it was a fun movie and i really liked the fact that the main character was actually smart and capable instead of being another cheesy female trope.

I have checked out Kill List. It was good, entertaining and i loved the disturbing/uneasy atmosphere throughout the movie. Also the fact that you're left to interpret the movie yourself is always a plus for me.