Arcturus Mengsk by Argush

Mengsk is a ranged assassin hero that is all about dealing damage thru cooperation with other damage dealers, while not being personally involved in a fight.

Arcturus comes from Starcraft universe where he is a Charismatic Leader, Emperor and a Tyrant. He doesn't posses any magical power because his raise in power came from clever use of Leadership, Deception and Treachery. As a commander he orders his troops as if they were expendable. He finds solutions in bombarment and nuclear warfare and even uses Zerg hordes to his own advantage.

His kit revolves mainly around giving orders to his teammates. Those orders bring value of Mengsk as a damage dealer but require team to cooperate. This allows his team to have a strong damage dealer that can't be focused or zoned. On the other hand he doesn't bring much value without allies.

This concept of a hero can be easily adapted to hero that doesn't require body to function. However I would strongly insist on bringing his cool appearance to the game. Having body will give him the same risk-reward while gathering exp globes as other heroes have. It's also an increase in APM.
As for basic attack he could shoot from a pistol as long as it doesn't trigger his abilities. Or not, it isn't necessary because his W will be his waveclear anyway.

I won't suggest any specific values for health and basic attack damage because it shouldn't affect how the hero is played.