What would you plant here?

What would you plant to fill in this gap at the front? Something tall.
Am also thinking of pyracantha to go in the void behind it - it's dry and dark - do you think it would grow?

Am also thinking of pyracantha to go in the void behind it - it's dry and dark - do you think it would grow?

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which looking at the photo would encroach on other shrubs within that area
Some species of Euonymus would thrive in that area such as Emerald and Gold that would grow about 2 feet in height but would sprawl up shrubs if left to grow.
This Euonymus are evergreen and a brightly coloured that would contrast well with other evergreen shrub within that area
But there are numerous shrubs that would work well in that aspect and other will hopefully provide alternative suggestions
I also like the idea of something clambering up through the shrubs and trees - something evergreen. Happy for it to be a thug as long as it doesn't damage what's already there. I suppose I could go with ivy, but something flowering would be nice. Does anyone have any ideas?