If you like toilet brushes, you go for the Knobbed Mace.
If you like metal sticks, you go for Flanged Mace or Spathovaklion.
If you like novelty dildos, I recommend Spiked Mace and Iberian Mace.
If you are into onions, take the Iron Mace (also Shrek).
If you are Hetman, use Winged Mace.
If you like to take it slow, go for Military Hammer, Warhammer or One Handed Bar Mace.
If budget matters, go for Club (it is really quite strong, same stats as unloomed Winged Mace).
All one handed maces are strong. The differences aren't tremendous and it comes down to taste in the end.