Heres my Blaziken's moveset and he hasn't failed very much.
Flamethrower
Earthquake
Thunderpunch (my friend suggested this, went with it)
Sky Uppercut
All but Sky Uppercut have 100 accuracy and that covers some of Blaziken's weaknesses (pesky water types). So if you're offensive this could be useful to you.
Most good Blaziken movesets only have three attacking moves and one support moves so if you dont like support moves then you should not be using Blaziken. You should be using Starmie or something...
Only 0mastar, AirLock200, TOY MACHINE, and *Ryan* know what they're talking about here. Avoid anything else that's been suggested, and since you're so on the offensive side, use Airlock200's CBken.