To many contenders in this category, but I'm going to have to say the Aulonocara baenschi. (a nice healthy male) or perhaps a really good strain of a Eureka Red.
I'm still waitin to see something off the charts,mindblowing,etc....these are some great fish,don't get me wrong.I guess,I just want to see something different.This one has some nice green on it.Let's see your titanium/electric,if they exist?