Some of the worst concentration, extermination and labor camps by Nazi Germany during WWII. Death tolls are very approximate due to high uncertainty for obvious reasons.
Firstly, I don't think the list is only Jews who were murdered, but others too. Secondly, millions were killed by bullets or in ghetto-liquidations and not in the camps.
Gross-Rosen/ Rogoznica (now Poland) and Janowska (now Ukraine) had around 30-40,000 each.
One could go on. It's numbing and monstrous.