ثُمَّ التَّوْرَاةُ وَالْإِنْجِيلُ وَالزَّبُورُ
Then the Torah, Gospel and Psalms.
The order is used in discussing comparative excellence, not merely to provide a historical date of revelation. Affirming the Qur'an's higher standing does not imply that the original Torah, Gospel or Psalms were not from God.
A book's superiority and another book's original divine authenticity can both be affirmed. The important distinction is between rank or merit and truth of divine origin: difference of degree is not denial of authenticity.