I would really suggest picking one line and sticking with it for a bit. If you like fieldstone, do fieldstone. If you want to go Gothic, go Gothic.

I would suggest for Gothic: 45, 50, 52, 201, and 240.

For fieldstone: 70, 701, 71, 75, and either 203 or 260.

You can NEVER have enough basic blocks, and if you're doing dungeons, enough floor tiles.