George Dawe
 (1781 – 1829)
 

George Dawe RA  was an English portraitist who painted 329 portraits of Russian generals active during Napoleon's invasion of Russia for the Military Gallery of the Winter Palace. He relocated to Saint Petersburg in 1819, where he won acclaim for his work from the artistic establishment and complimentary verses by Pushkin. He was the son of Philip Dawe, a successful mezzotint engraver who also produced political cartoons relating to the events of the Boston Tea Party. One of his brothers was Henry Edward Dawe, also a portraitist. He died on 15 October 1829 in Kentish Town, United Kingdom.

https://en.wikipedia.org/wiki/George_Dawe

Imogen Found in the Cave of Belarius
From Cymbeline, Act IV, Scene II
Circa 1809
Oil on canvas
100 x 127 cm
Tate Britain

And another picture of Imogen :

Anthony Devas
(1911 - 1958)
 

Thomas Anthony Devas was a British portrait painter who was associated with members of the Euston Road School.

https://en.wikipedia.org/wiki/Anthony_Devas

Dame Peggy Ashcroft (1907–1991), as Imogen, Stratford, 1957 (from 'Cymbeline')
1958
Oil on canvas
153 x 102 cm
The Royal Shakespeare Theatre