Please note that this is my opinion, and i don't know all of the TV-shows that are/have been on television. Since this list is pretty old it might be somewhat outdated.

My top 10 TV series:
1.Friends

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2.Game of Thrones

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3.Sherlock Holmes

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4.Downton Abbey

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5.The Crown

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6.13 Reasons Why

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7.Pretty Little Liars

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8.Keeping Up With The Kardashians

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9.Life of Kylie

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10.How I Met Your Mother

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These shows are mostly comedy, action, fashions and survival oriented.