The ferns humidity issue was something I neglected to pass on. It's especially problematic in winter when there is less light and much less humidity inside with the furnace on (assuming one isn't living in Florida). I have found a humidifier/mister to be very helpful.
The hibiscus is really an outdoor plant. If you buy it for indoors in the spring... it goes dormant... doesn't reflower... and you throw it away in the fall. Not a nice thing to have to do to a plant pet. If you can keep it on the patio...maybe... but it is going to struggle in most winters here... being a tropical plant. When I see them indoors... I can almost hear their soul crying.
Philodendron is a great idea IMO. Big leaves. Hardy. Fast growing. Also likes humidity but much more hardy than the ferns.
The hardiest no-brainer indoor plant that doesn't require mountains of light and grows like a weed is the pothos vine. Lots of oxygenating leaf area. Need somewhere to trail the vines though.