Goblin Haberdasher somehow makes it so that your creatures that are seen wearing a hat get Menace, a very useful ability that forces players to assign at least two creatures to defend against an attacking hat-wearer if they want to avoid damage
For example, your deck could contain lots of enchantments and artifacts to boost a relatively low number of creatures
If were allowed to get out of hand, theres also the opportunity to get the Springheart Nantuko on any of these (oh, if its the Baloths!) to make token copies of them with every land, turning a modest 5-land entry on a turn from 5 4/4 beasts to 5 copies of Frenzied Baloths, plus 1 + 2 + 3 + 4 + 5 beasts, for a total of 15 4/4 beasts suddenly appearing on the field
There are many cards that are not charms that are highly versatile and offer similar kinds of utility to that which allows Rakdos Charm to make Magic better
The Cycle of Verge Lands These are all allied dual lands that enter untapped, so thats already great