Looking for an adc to play. Suggestions?

Ezreal.

Lucian or Ez.

Mobility......

Ezreal, Lucian, Vayne for high mobility.

Caitlyn, Quinn, Corki, and Tristana for medium mobility.

And then theres Xayah. Xayah is nice.

kog'maw

If you don't trust yourself to kite I'd say ezreal is the best choice. One of the strongest repositions in the game, waveclear is probably his only weakness

Lucian atm imo, but Ez is never really "out-of-meta" so he is generally a good choice too

The problem with lucian is hes gonna get the nerf cannon soon, ezreal a great adc at the moment who's meta and has mobility