unheated north facing conservatory plant ideas

UpNorth

I have a some Kentia, Areca and other Palms (Ikea), a few Philodendron.

there's lots of houseplants i'd like, but often "minimum 15 degrees" and the palms already need overwintering in a warmer spare room, with little light, i don't want more!

so what i'm looking for is suggestions for plants that can live between about 1 or 2 degree lows in winter, to rather hot days occasionally in summer.   

one that comes to mind, fatsia japonica and i have a few i will grow on to be houseplants.

bamboo comes to mind, but obviously not cheap to buy and i'm not sure they'd tolerate indoors well? 

can anyone think of any other, indoor or outdoor evergreen or semi evergreen plants that would tolerate indoor life described?   trees, shrubs, trailing/climbing, all welcome.  I appreciate i might be asking the impossible here!

Pete.8

Ivy seems to tolerate almost anywhere and there are many varieties
I'd imagine ferns would be OK too

Fire

I would love this, if there is enough sun for it.

Abulion Nabob.

Also scented leaf pelargoniums like this one.

I had a scented pellie as tall as me, small pink flowers - incredibly vigorous if watered enough and in a large pot.

I can send you a cutting of mine if you fancy and if it's your kind of thing.

UpNorth

@fire thanks for the kind offer, but i think i need something less flowery ( ie i don't have enough light for that) and looking for taller too.   maybe i just fill it with Fatsia and palms!