I'll definitely recommend Shen if you like playing tanks, he has fantastic map coverage with his ultimate and Feint got an IMMENSE buff.
Kass is great, though squishy his skills deal a lot of damage and silence always helps. Plus he has a free blink, who doesnt love that? A little hard to use though if u overestimate the blink.
Shaco is actually a very good early game ganker, so if you like ganking early... He is a pretty good buy.
Personally, Heim is a great hero... But the nerf to his rockets really made him much easier to handle than last time.
Credits to Noperative for the sig!