Hey thank you for the hint. Until now i noticed and tried the following things:
@tipU
@randowhale
@minnowbooster

Another good thing is @OCD with their daily issue, if they see a good post and put it in a issue then it's like a fountain of upvotes. I did it with my post about robots and AI. But i think they looking always for the highest quality and there is so many good stuff around.

I'll take a look into Steemfollower. Many thanks!