Shady area...any suggestions?

This corner of my garden is now permanently in the shade due to the tree in the picture ( which no one at my local garden centre seems to be able to identify). I was going to turf it but am sure that this will just be a waste of time. I tried seeding it last year but the grass eventually died away again (shady area grass seed). So instead, I thought I might simply dig away the corner, thus creating a new bed. It will only be about a metre and a half square.
Does anyone have any thoughts on possible plants to put in? I love ferns so will probably get a few of them but would also like other plants if poss. Any suggestions? I have googled it but I always like to ask people on here as I really value their opinion; it's nice to actually feel you have 'talked' to someone.
I have no idea why my photos always seem upside down!

 

Forget turfing it Mark , it will be difficult to establish and maintain. I have a shadey area which I am trying to plant up a little better this year.
Look at ..............
Hostas
Skimmia
Acanthus
Brunnera ( Great forget me not ) Just planted it this morning !

Ajuga Reptens - many varieties


Polemonium - Jacobs ladder

 

I personally would avoid Ajuga as it walks like crazy here!

A couple more;
Polygonatum hybridum.....................


Uvularia grandiflora.................




Both are spring bloomers (as is Viola labradorica, which also walks and self seeds but personally I prefer it to Ajuga).

Lobelia erinus always seems to grow well in hanging baskets in shade, so that may be worth a punt? As is Nicotiana langsdorfii. I grow Impatiens balfourii in deep shade.

 

The tree isn't Osmanthus is it?

 

I think its an Upsidedownithus Loli

 

Yes, another shady area here as well, I have decided to go for a Hosta, though I agree that Brunnera is rather nice as well.

Val

 

Can you post a close up of the tree's leaves please?

 

I would like to add Pulmonaria, hellebores, astillbe and lily of the valley to the list


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I would like to remove Pulmonaria from the list. Grows like an absolute weed here! Lily of the Valley is rather invasive too, but easily controlled with a trowel when it gets too bad. But Pulmonaria self seeds like crazy, and the seeds are viable for a long time as I dug it all out two years ago!

 

my shade gardens can be found at Estherredstar channel.

 

Thanks for all the suggestions! Def something to think about. I've got ajuga growing in my border already (second year) and I love the flowers... So do the bees! I think I am going to go for a mixture of ferns and a couple of others from the list. I just adore ferns...think they look beautiful.
Here are the requested leaves of my mysterious tree!