Champion Decision

I'm looking for a new champ, i have heard many things about champs and playing too many in different roles.

I am a Lucian main I can pretty much play him ADC (obviously), top and mid - other than Sup and Jg but I'm looking for a new champ.

Choices:

• Ekko - Kennen - Dianna - Graves - Shen

I like playing mid a lot