There is no hard rule about alignments and classes, or classes and races. The books specifies generalities, and also gives counter examples. For example, in the Paladin class under the Oath of Vengence Tennents (Page 88 of the players handbook), it says that Oath of Vengence Paladins are often Neutral or Lawful Neutral in alignment.

A neutral good tiefling rogue is perfectly acceptable.

There is no hard rule about alignments and classes, or classes and races. The book specifies generalities, and also gives counter examples. For example, in the Paladin class under the Oath of Vengence Tenets (page 88 of the Player's Handbook), it says that Oath of Vengence Paladins are often Neutral or Lawful Neutral in alignment.

A neutral good tiefling rogue is perfectly acceptable.