Here are all the Masters of Evil from Avengers: Earth's Mightiest Heroes, gathered in one place.
- Baron Zemo
- The Enchantress
- The Executioner
- Wonder Man
- Crimson Dynamo
- Living Laser
- The Grey Gargoyle
Ranged attacks--well, many of them have a ranged attack.
* Zemo has his blaster.
* Chemistro's ill-defined power is useful only at range.
* Living Laser is only useful at a range.
* Whirlwind and The Executioner can do things at range, but they prefer to be in there hitting.
* The Crimson Dynamo can, but tactically he seems like a guy who clears out the mooks and then tries to hit things.
Most of them are useful in hand to hand combat: the Abomination soaks up damage, the Crimson Dynamo soaks up damage, the Executioner soaks up damage...
And the presence of Iron Man on the team drives a quarter of them to insane acts.
Despite their reputation, they're only okay against the Avengers if Zemo has a plan. Think about them carefully if your heroes are significantly different from the Avengers.
Heroes who aren't affected by magic or who have a lot of powerful ranged attacks are going to yawn, pick them off, and ask when it will be tea-time. I suspect you could take them apart with the proper mix of characters just because those characters hit the weaknesses of the Masters of Evil. (Hmmm...maybe it's time to haul out the Mythic GME and try just that.)