Well I've been at work all day since you got this up, so there is that... But I'm here now! I'll have to think on a character for a bit though. From the looks of your tier system, the best of the real life human fighters would be in tier 3, correct? There's several UFC fighters with punches measured in excess of 2,000 pounds of force (and kicks in excess of 1.5 tons of force).

Though realistically, it seems that someone capable of lifting 3 tons would be more than capable of moving their own fist fast enough to generate a LOT more then 5 tons of force (much less someone who can lift 5 tons and the force they could realistically generate). Tying the two together seems like an oversimplification. If I may make a suggestion, setting max striking power (in a punch) at twice the max lifting weight would make a bit more sense, without crossing to the other side of the line and over-complicating the issue.