Solmyr, Demeer, and Aislin are cheaters (and/or) kamikazes; do the rest have a right to exist?

I disagree. He's stronger. Look at the statistics on the Dream website. Cobra has a 11:1 record. Victories against the strongest Heroes players. Similar statistics can be found on Battle.net. He also appears in online games from 2005. That means he has a lot of online experience. And Decontaminator has a 3:21 record.