Suggest a tree please

[SPARKLYSTARSHINESBRIGHT]

Hi, please can you budding gardeners suggest a suitable tree for my garden to help screen from neighbours. Preferably evergreen, to reach at least 8 metres. It's to go behind a retaining stone wall so not have too invasive roots. Any ideas please

Myrtle
Evergreen
slow growing
nice red bark
white flowers
Can be seen in Knoll gardens in Dorset among other places

Otherwise (not evergreen)
Silver Birch

Otherwise
Magnolia grandiflora
Monkey puzzle tree

www.majestictrees.co.uk/garden-screening-trees/privacy-a-guide-to-evergreen-screening-trees.html

thanks funnyperson, some great ideas and link