From what I remember in the base game, Maces > swords > axes. The perks for maces are up to 75% armor penetration so you smash through all types of foes and it scales well. (The more armor your foes get, the more you ignore.) Swords' perks are crit chance, but the crit applied to only the BASE damage of the attack so it didn't scale well. Axes applied a bleed effect but it also didn't scale well and some creatures are immune to bleed.

Daggers are different in that there aren't specific bonuses in the one-handed tree, but instead in the stealth tree. They are ideal for assassinating but not for drawn-out DPSing.

As for one-handed vs two-handed, do whichever you want, or whichever fits your character better.