A lot of bands have great debut albums. Obviously this list is just a fraction of all the great debut albums out there, but it's a start. I'll keep expanding this list continuously, so all suggestions are welcome (granted they are featured on MS). All the albums here are ranked according to genre and then alphabetically. If a certain album belongs to the (in your opinion) wrong genre, then definitely let me know.
When searching albums of a certain genre, just press "Ctrl + F" and then enter the genre you're looking for. For example, when looking for death metal albums, simply enter "[death]" after you pressed "Ctrl + F" and you'll be at the right place in no time, so it works perfectly.