Is unity Animator or Aseprite animator good for smooth animation?

Hi! Im making a pixel sprite that has walking anim,idle anim etc. And I have a lot of character in my game so it is hard to draw all the characters walk,idle,attack anims. So i thinking that seperate all the piece of character (head,arms,legs,chest,foots) and put those to unity and make their move in animator. Do you prefer to make it or just using the aseprite to draw all the animation by hand by spending a lot of time?