nzxt h440 is a mid tower, supports triple 120mm rads on front and top of case
Coolermaster cosmos se (what I'm using but I modded for triple 140son front) you can run a 360mm rad on the front (and no, does not fit triple 140mm rad without picking right rad and heavily modding)
Silverstone primera supports triple rad on front
Corsair Obsidian 450D should support triple radiator on top (mid tower)
that's 4 pc cases that are mid towers. I honestly don't thing you've looked