Im in Amsterdam but i see all Netherlands as one country (since its 5 times smaller than my naitve Sweden) and you can travel all over it in 5 hours tops
Theres tons of dutch doom and protodoom bands in the D.I.Y scene.
Roadburn in Tilburn and Dutch Doom Days in Rotterdam are also a treat.
For instance The Lamp Of Thoth, Warning, Griftegard, Sub Rosa and tons more have played at The Dutch Doom Day festival in Rotterdam.
Bands i like from Netherlands: Tonerlow (fucked up pysch sludge doom), The Devils Blood (occult rock), Orange Sunshine (60s Blue Cheer style), Heavy Lord (Sludge Doom), Lucid (Stoner Rock), Officium Triste (Goth Doom), Massa Christa (Stoner), Mary Bell (Sludge)