Your question is too broad, but I’ll give you some reference names.

Names can be divided into two categories, one is what you like, and the other is what everyone likes.

In my opinion, a screen name should be an impressive name. You can refer to the following names.

Gu Kaixin, Gu Mian, Gu Yan, Gu TK, Gu Pansheng...

Next time you ask questions, remember to be more accurate. The answer you want depends on how you ask the question.