BartekAllen

Neither has a whole lot of geometric stuff on their instragrams, but both do illustrative blackwork real well and lean in the direction you're looking for, I think. Check out Kelly Severtson and Jacob Kearney, both in Chicago. 

If you are willing to travel to Columbus, Ohio then I'd hit up Dino Nemec.

Hi. Not sure what the name of those styles are, my guess would be dotwork/geometry. 
As far as finding an artist goes; check out Tattoodo, they have a great catalogue over many things, including artists/shops in major cities. There's also an app you can dl to your phone.