Salam,
John Keats is not an escapist ....no doubt in his poems he tries to escape from the realities of life but in the end of poem again returns to the same reality...the person who can appreciate even Autumn in these words,
"
Where are the songs of the spring?............
Think not of them, thou hast thy music too"
can not be an escapist...
Similarly in his
"Ode to Nightingale "in 1st 8 stanzas he tries to escape from the reality of the world but in the last stanza again comes back to the real world....same is the case in "
Ode To the Grecian Urn",in which he comes out of the fancy world of Urn with a great message"
Beauty is truth;truth beauty,--that is all
ye know on earth & all ye need to Know"
So we cant blame him that he is a escapist only...
Robert Browening no doubt good poet also...master of dramatic monologues...
with regards,
Muskan