I have been testing out a lot of console commands to find that perfect thirdperson. Finally I have found the best mid range thirdperson, I do not recommend using AUG, Sniper the weapons with scopes, if you want to make sure you add a quick button to bring you back to firstperson (Look at Bottom of Guide), thanks. This WILL NOT work on Offical servers or with servers with "sv_cheats 0", the server must have "sv_cheats 1" for this to work. Soon I plan on adding videos for each (maybe just Mid of the Range) for you guys to see what it looks like. Type 1 of these 3 commands, best for all play type is Long Range

Video of Thirdperson
https://www.youtube.com/watch?v=1WkfMl65ZQI

Close Range:
sv_cheats 1;thirdperson;c_thirdpersonshoulder 1;cam_collision 1;weapon_accuracy_nospread;cam_idealdist 50;c_thirdpersonshoulderoffset 12;weapon_recoil_cooldown 0.01;weapon_recoil_scale 1.0;cam_idealyaw 0;cam_idealpitch 1

Mid Range:
sv_cheats 1;thirdperson;c_thirdpersonshoulder 1;cam_collision 1;weapon_accuracy_nospread;cam_idealdist 50;c_thirdpersonshoulderoffset 12;weapon_recoil_cooldown 0.01;weapon_recoil_scale 1.0;cam_idealyaw 1;cam_idealpitch 0

Long Range:
sv_cheats 1;thirdperson;c_thirdpersonshoulder 1;cam_collision 1;weapon_accuracy_nospread;cam_idealdist 50;c_thirdpersonshoulderoffset 12;weapon_recoil_cooldown 0.01;weapon_recoil_scale 1.0;cam_idealyaw 0;cam_idealpitch 0

If you'd like to disable thirdperson type "firstperson" in console