Couldnt help it but your comment reminded me of this :
https://www.youtube.com/watch?v=4iWvedIhWjM 
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We really dont know what are the limits of his DF. It would be funny to see him doing something like the video above.
I really like his DF , but if the DF can be only as good as the user's drawing skill....
Haha!
The video makes me laugh. This is really classic. At least Coyote's drawing looks real, unlike Kanjuro's which is way off.
However it appears that his drawings, despite being poorly drawn, did work to a certain extent. For example, he had drawn a large sparrow and brought it to life, and used it to escape. The only setback was due to his poor drawing that the sparrow could not fly very well.
On another account, he had use his busoshoku haki in aid of his ink brush to help Zoro and Kinemon to push back the birdcage. For this, i would give him the credit.
In terms of one vs one battle, if he uses his poor drawing, he may not be able to succeed unless he improves in his art.
In this group I would vote for Chopper as the first choice as there is enough information about him and I particularly like his perseverance in trying to succeed in life. First he was seen to be studying diligently in medicine, to become a good doctor. Though he had failed and even caused the death of his father, he did not fall back and give up. But instead he continued to study and did many research in order to become a better doctor. Besides his profession, he is also very persistent in becoming stronger physically. That is shown in how he has done research on his rumble balls and he continues to improve in the formula so that he can be useful in the crew. At this moment, he has already achieved "monster point".
Honestly it is rare for a doctor (or healer) to fulfill other roles besides his/her own role. But for Chopper, he is not just a doctor but a powerful one who can fight at the front line. It is something uncommon in most cases where a doctor assumes other responsibility other than medical practice.
I do agree that Chopper may have limitation in his abilities but I hope in time to come, he may be able to increase the time in his "battle" form through his continual research. I am really impressed with his capability.
The second person to vote is a difficult one. I'm tossing around the remaining people.
Nami, similarly to Chopper, is well-known to us and we have seen how she fights for a long time. Thus we have a lot of information about her. Her ability is pretty good and she has defeated many opponents who are much stronger than her. If she pairs up with Chopper, she would be very powerful.
The rest of them are quite a mystery. Koala for one, though she isn't a fishwoman, is able to learn and teach Fishman Karate and this does make her very impressive. She is also able to defeat enemies larger than her.
Hack is a fishman. Not much has been shown about him except that we know that fishmen are stronger in terms of physical strength as compared to humans. They are also very good in water since they are basically "fish" which humans have disadvantage of as humans can't breathe in water while fishmen can.
Hack is a Fishman Karate's instructor, I would reckon that he is very good in his trade for him to be in this level to teach others.
Oh my... with little information of the remaining, besides Nami and Chopper, it is a hard decision. I can even imagine Chopper and Nami vs Koala and Hack and see which team would win.
I think I can leave Kanjuro out unless he can improve in his drawing. I suppose at one point he would need to utilise his ink brush in his advantage. But if he can't draw well, then whatever he draws may not work as effectively and/or efficiently to help him. His sparrow is one example.
For Hack and Koala, they are in need of a proper battle (in future arc) to showcase their abilities and skills. Hence I would leave them out at the moment.
Lastly the second person I vote for is Nami. I know how well she fights and I believe that she has gotten better after all these time. Though in Dressrosa arc, she isn't involved much, particularly in any kind of fighting, but it seems that after the Dressrosa kingdom's issue has been settled, the focus should be on her (together with the rest of the crew like Sanji, Chopper and Brook). So I'm looking forward to see Nami's performance. Hopefully she is able to come out with some new tricks. After all she is quite a smart girl and may have something up in her sleeves.
It is always sad to choose especially all of them have their unique skills and they fair differently with different opponents. So let's move forward.
)
