I'm not so sure about Fischer. My albeit brief look at his time at Union Berlin suggests that his 4th place finish was largely due to an extreme over performance in front of goal, wherein they scored 51 goals from an xG of 38. They then underperformed the following season and barely stayed up.
His tactical style seems hard to pin down but looks like it's a back three, and certainly more noted for defensive solidity than great attacking play. That said, if we were in the Premier League I'd expect similar, but we're not.