Not quite.
1. Tupac Shakur: Before his untimely--but perhaps predictable murder given his criminal associations and conduct (read the rap sheet)--Shakur was a much-lionized and successful recording artist and could have had an enviable career as an actor were it not for his felonious, violent conduct, including sexual assault, a wrongful death suit, etc., etc.
en.wikipedia.org
2. Janis Joplin: Much celebrated during her short career singing with both Big Brother and the Holding Company and as a solo artist, Jolin had both a #1 record in "Me and Bobby McGee" and a Platinum record with "Piece of My Heart." Had she not killed herself with a heroin overdose, she might have had a longer career, although it is arguable that the manner in which she sang--however effective--would have, in time, destroyed her voice, and she would end up sounding like Maryanne Faithful does today.
3. Otis Reading: Wow! Have you looked at his discography? Listened to his hit songs? "His performances, music publishing ventures and royalties from record sales earned him more than a million dollars in 1967 alone." (In 1967 a million dollars was real money.)
4. Van Gogh: You're right in this case, although Van Gogh was known and respected by other painters at the time: Emile Bernard, Henri de Toulouse-Lautrec, Camille Pissarro and, of course, Paul Gauguin, among others. I've visited both the beautiful monastery asylum in the countryside outside of St.-Remy-de-Provence where he lived for a year and, last July, Auvers-sur-Oise, the town outside of Paris where he lived for the last two months of his life and where he and his devoted brother, Theo, are buried. I recommend his letters to Theo: quite insightful. Also, the movie about his time in St.-Remy, At Eternity's Gate.
5. Monet: While his work was initially decried by some critics, by the mid-point in his career he was successful enough to purchase a house and land in Giverny where he created the soon famous garden that became one of his great sources of inspiration. He was one of the most celebrated artists of his time. Again, I visited there last July. (The beauty of the paintings surpasses that of the actual garden.)
6. El Greco: While he failed to receive royal patronage in Madrid, his career flourished in Toledo. The minutes of the commission of The Virgin of the Immaculate Conception describe him as "one of the greatest men in both this kingdom and outside it." You should know The Burial of Count Orgaz. It was immediately recognized as one of the greatest paintings in the city.
7. Martin Luther King, Jr.: Nobel Peace Prize, 1964.