Hahahaha...no. I love harry potter but....no, just no.

"Voldemort, Bellatrix and umbridge are so "bad" I almost love them for how evil they are"

Yeah, well let me tell you, Voldemort and all his deatheaters combined are about as frightening as a litter of bunnies compared to Sauron alone, whose jewellary alone spelled doom and destruction for an entire continent.

"Rowling's world of magic is incomparable"

Are you serious? Tolkien invented entire histories covering thousands of years. He created unique, detailed cultures (at LEAST ten) of elves, dwarves, men, orcs and ents. He invented several detailed languages, quenya, sindarin, adunaic, dwarvish, the black speech of mordor, etc. How many did rowling create? None.

"She invented so many creatures and magical items"

Rowling created threstrals, houselves, pygmy puffs and arguably dementors. the rest were just modern spins on existing mythology. She did not invent phoenixes, just altered them. Same for sphinxes, dragons, unicorns, etc. Tolien, on the other hand, completely invented the characteristics, culture, history and appearance of elves; balrogs, orcs,nazgul,ents and many other creatures. Also, two of her most iconic magical items use ideas FROM LOTR. Horcuxes=One Ring. Pensieve=Mirror of Galdriel.

"it just shows how much effort rowling has contributed to her work"

Sure, she put a lot of effort, but tolkien put more. Tolkien invented MANY cultures, languages and histories, where as rowling just invented one wizard culture.