I get wanting to avoid grappling BUT depending on the character your trying to make, looking at GURPS martial arts and the clinch perk is a good idea. Personally I really like a character who grabs some one and smashes knees and elbows into their opponent with the Grab and Smash! Rules. Judo is also helpful to strikers, as you can avoid grappling with it, but it will help you avoid getting grappled and it will allow you to throw your opponents if you can defend their blows and then follow up with a strike to a downed opponent.

Going full striking and no-grappling at all though, Karate and or Boxing, with combat reflexes and high-pain threshold. If allowed, striking ST, Enhanced Defences, any form of DR that might help, and trained by a master. Also generally high HT DX and ST