Came up with this as a possible encounter for a group of level 4-5 level 3 characters. [Disclaimer with the house rules I use this is an actually viable encounter creature even though it's 7 levels higher than the group, your mileage may vary.]
This is just an example of tweaking an existing creature. I took the Hill Giant which is a level 12 brute, dropped his level in the character builder, reset the damages a bit to nudge him closer to a soldier while keeping the defenses and hit points etc of the brute, and added in a couple of powers as the default Hill Giant would be boring as a boss encounter. With the other things I’ve got planned for this encounter I think it’ll be a good BBEG level encounter for the group.
You can grab the monster builder file here [Download not found] and an image of the creature below you could print out.