My mind boggles when I look at your list of offered pokemon (of course my mind completely shuts down whenever I tried to read up on how to RNG. The instructions make it sound like I need to use a ROM to figure out... stuff that I can't really even comprehend.)
For your listed brave natured Gurdurr I'd be willing to offer a Buffalant that I took to the VGC11 California regionals. I don't quite remember what the heck the ev's are, just that I put nearly even distribution between SpD, Hp, Att, and Def because I was expecting to be attacked by teams that would use physical and special attacks on the same turn. My only lament with her is that her highest IV is her special attack.