Excuse me but i am a zilean mid main no but its really fun if you can hit your q.
and i just named the ones that aren't good at all at support cuz it would be good if he started getting good at the good champs(like alistar) instead of the unreliable champs that u dont usually have fun playing.
Out of the supports tacos pointed out i suggest annie, janna, and soraka. All of them besides maybe janna are very easy and can be very good.
and all the adcs that taco pointed out are top tier atm