From what I can see I think its between Floyd Snr and Roger. Roger - works on speed, reaction co-ordination Floyd snr - jab and defense To dodge punches Roger extends his arm and Floyd Snr moves his arm in a looped fashion over the fighter's head. Roach is not bad either.
Why u think roach? he doesnt do anything special Floyd and Roger know what there doing - they created the most accurate and slick boxer for years with floyd jnr
the way roach holds the pads simulates a real opponent, he doesn't just stand there like roger mayweather . floyd sr is also brilliant on the pads