I've figured out a great replacement name for the class Riot's been referring to as 'light fighters'

TL;DR: Fencers

The class is made up of (from what I've seen) Aatrox (possibly diving fighter) Diana (same as Aaatrox) Fiora Gangplank Master Yi Riven (maybe) Tryndamere Yasuo

These champions have been referred to by Riot as 'light fighters', or champions who have little CC, are squishier than bruiser, and dash in and out of fights to deal auto auto attack based damage while avoiding being blown up. I originally thought of the name swordfighters as they all wield such a weapon, then thought that it would be confusing as champions in other classes also wield swords. I then thought up the term fencers after looking over the class. Fencing is a sport where two people, using long thin swords, attempt to stab the other(they wear armor so it doesn't hurt). The way they go about this is being light on their feet and moving in and out carefully plotting their attacks.

This form of fighting lightly dashing in and out is how this class plays and how they should be described as, fencers.