Sounds a little like Snake's Clan by Kanui d' Astor (loved her) http://www.fanfiction.net/s/1632732/1/The-Snake-s-Clan
Where Draco takes over every single slytherin. (It is...... not bottom!draco but not specifically top!draco either)
And if you don't mind self-pimp.
The One Mistake Turned Right by yours trully in which the Slytherins (led by Draco) decide they are going to run their house without Slughorn because he's a bad role model. http://www.fanfiction.net/s/5565934/1/The-One-Mistake-Turned-Right
no subject
http://www.fanfiction.net/s/1632732/1/The-Snake-s-Clan
Where Draco takes over every single slytherin. (It is...... not bottom!draco but not specifically top!draco either)
And if you don't mind self-pimp.
The One Mistake Turned Right by yours trully in which the Slytherins (led by Draco) decide they are going to run their house without Slughorn because he's a bad role model.
http://www.fanfiction.net/s/5565934/1/The-One-Mistake-Turned-Right