Since the last support designed as an Enchanter was released (Nami)
http://leagueoflegends.wikia.com/wiki/List_of_champions
Edit for clarification : Rakan, Bard, and Ivern are "Catchers" not enchanters
https://na.leagueoflegends.com/en/news/game-updates/gameplay/taking-another-look-subclasses
Critmaster Garen3 votes
and isnt 
an enchanter aswell?
Taliyahc1 votesBoth are catchers
Taliyahc1 votesI can't find the official League list still looking but it classifies all the champs by the class they were designed, for reference
Taliyahc1 votesHey found the clarifications as to why they are catchers and not enchanters
https://na.leagueoflegends.com/en/news/game-updates/gameplay/taking-another-look-subclasses
also listed here for reference