Sociopath Community

None of these will ever outdo Tsundere behavior. It's the repression of their true feelings that makes them batshit, ready to burst forth. 

You need look no further than Helga G. Pataki for setting the bar: 

Tsuderes are nice. The best combo would be a yandere tsundere. I still need them obsessed with me and willing to kill any man who looks my direction (figuratively). But still willing to be violent when needed.