Who used oxymoron in midsummer nights dream?

Quite a few characters use oxymorons in A Midsummer Night's Dream, Hippolyta used two in Act IV (Four) Scene I "So musical a discord, such sweet thunder." 4.1.122 'Musical a discord' is an oxymoron because musical is melodious and flows together, and discord is disconnected and broken. 'Sweet thunder' is also an oxymoron because thunder is loud and scary, the exact opposite of sweet.

Theseus also uses an oxymoron in Act V Scene I Line 60-63