I would say it depends on how many Charge TMs you have already and how often you can get them. Counter + Close Combat is a decent moveset but if you really want you can try for Dynamic Punch given you're a frequent raider. Prioritize your 100 percenter because it's now your highest level & IV Machamp
What to do with my Machamp?
I have a 100% Machamp which I have been powering up, he is now level 32. His original move set was Counter / Heavy Slam, but using a Charge TM it is now Counter / Close Combat.
I like Close Combat, but it seems Dynamic Punch is better. Would you use more Charge TM's to try and get it, or be satisfied with CC?
Note: I have another level 30 Machamp with the same move set (C/CC), and two others with Bullet Punch and Submission & Cross Chop. All of these are lower IV's (70-91%).
Answers
I'm in a similar position with a Machamp who naturally rolled Bullet Punch and Close Combat as its moves. Machop are fairly rare here, and I have a grand total of two Machamp to my name so far, so I can't afford to be too picky with them.
The next Fast TM I get will rectify the first problem, but I'm not going to try and re-roll CC. While Dynamic Punch is a better move, it doesn't seem a significant enough improvement to risk wasting a Charge TM on and risk getting Heavy Slam which is almost useless on Machamp. I've seen someone waste several TMs chasing that perfect move, and I don't have those kinds of resources.