What portrait of usher do these details create

I'm not sure what details you are referring to. Never having crossed lines with other families, the Usher name lies entirely "in the direct line of descent"--so that, after Madeline dies, Roderick is his family's sole living exponent. At the beginning of the story he already suffers from a severe mental illness, which steadily grows worse as the tale progresses. After his sister's death, he seems to retreat completely into madness. Before that precipitous fall, however, he dabbles in painting and shows himself to be an able guitar player. A man of culture and erudition, Roderick Usher spends his days inside his dark and cavernous mansion, avoiding sunlight or the smells of flowers, and obsessing over "the sentience of all vegetable things."