Vandaceous plants need very bright light. A north-facing window will never do.
Phalaenopsis can probably do quite well there, but need unshielded exposure to the window - no shadows, nor draperies.
Pretty much everything else is in-between, needing more light than I speculate they’d re getting there, but not as much as the vandas. Those on the top shelf will never get enough light.
You’re going to need to supplement that light to varying degrees and group the plants accordingly.