MM-like AT that leads from the front...

[Legree]

It'd be absolutely goofy and dumb and I would love every second of throwing wave after wave of disposable cannon fodder at my foes until they choke and die.

 

As a long-time fan of Gang War I approve of this.

[Doctor Brainbottle]

MMs are already a class that can "lead from the front". All you really need to tank with an MM is a taunt power, and an AOE heal. These are already available to MMs, in various secondary power sets and generic power pools, but I suppose we could create a new secondary power set for masterminds that is more explicitly built to support this play style. I'd give it:

 

an AOE heal at a fairly low level,

a bunch of melee attacks that don't do amazing damage but have a built-in taunt,

a pet aura toggle that gives a huge defense buff to pets, but only vs. AOE,

and a good mez protect power.

 

Being a SECONDARY mastermind power set, you would then be free to pair it with any pet type you like. I wouldn't mind playing that secondary with demons, myself.