The two that come to mind if you want to see action poses are Kenichi, and Karate shoukoushi kohinata minoru.
You can find a lot on Mangafox, but manga I read at the moment are the big three's (Onepiece ((FAVOURITEEEEEEE)), bleach and Naruto) other than that there is "Historys strongest disciple kenichi", which despite it's over ecchii-ness which I hate, the action poses and effects are great! then there is "Karate shoukoushi Kohinata Minoru" and "One punch man".
You already have an amazing style and whichever method of sketching you choose I am sure you will still create amazing art . I especially like the ones at the top though. I guess one thing we can't see from the sketches above is how long they took to finish and I am sure that too will play a role in what method you choose.