in mma if you want to see people w/ solid boxing skills i would recomment watching jens pulver, esp his fight w/gomi; he used the jab..r.cross...hook very eff, he also showed gppd footwork, threw combos to the head and body, miced his shots..set up his punches..went through all his def checks and showed how to use ur arms, forearms to block head and body shots.. tht fight is the best example of boxing in mma.
other fighters arvloski...edwards..an in the early ufc's don frye v goodridge in the uu showed very good boxing in regards to body work, def, inside fighting, jab, r.hook and cross and fairly eff uppercuts..
but if u wanna see the best example of boxing watch floyd mayweather...antonio tarver or tapes of pernell whittaker..ricardo lopez...mark johnson..ray leonard and robinson.