Looking for a new champ to main. Help?

Hey guys, I need some serious help. I am willing to consider any suggestions from any elo as long as there is some reasoning behind what you say.

I am looking for a new champ to main. I tend to like the top and mid lanes more than any of the others but I will take suggestions for other roles too if you think it's a really good idea. To give everyone an idea of who I like and where to maybe stick around, I like the following camps as some of my favorites to pick: Sion, Graves, Ekko, Olaf, Brand and Cho'Gath.

I appreciate anything constructive people have to say about potential next champs. I also support non-meta picks, so don't be afraid to throw anything out there as long as it makes sense! Thank you all!