What ranged supports to play in Arena? New player seeking advice.

For various reasons I don't enjoy Arena but I understand that being a new player is making the mode feel worse for me.

I love playing support but I'm really not sure what to bring to Arena. If I could find at least one ranged support that can do well there maybe I'll finally enjoy it?

I really do not want to play a melee champion. I have tried many and have yet to find a single one I find vaguely tolerable. I'm not saying any melee champions suck, it's just not something I enjoy to play.

Ranged supports I have played most: Senna, Janna, Sona, Karma, Seraphine and Lux.

I have so far brought Senna and Lux. I had some minor to moderate success with them but very often they barely tickle the tanky champions...and almost every match up I go against has tanky champions. It has made me wonder if bringing a ranged support is perhaps a bad idea but I am very aware that my knowledge about the game is frankly lacking, given I'm new.