Looking on the internet deeply has found these results:

DO WELL TO HIM. is the most popular phrase on the web.

DO GOOD TO HIM. 1332,000 results on the web	DO WELL TO HIM. 15,220,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
And you should be good to him. Liz, be good to him. And let Mom be good to him. Your family was always very good to him. And I wasn't good to him. They were always good to him. Tell them to be good to him. She better be good to him.	As you go after him, you'd do well to remember that. Ms McKenna and her colleagues would do well to follow his example rather than criticize him. The Commission would do well to reconsider. You would do well to tell it to him in advance. If you can do something, you may as well do it to him. It was a valuable lesson that we would do well to learn. That is something we would do well to recognise. That is something that the European institutions would do well to recognise.

DO GOOD TO HIM.

1332,000 results on the web

DO WELL TO HIM.

15,220,000 results on the web

More popular!

As you go after him, you'd do well to remember that.
Ms McKenna and her colleagues would do well to follow his example rather than criticize him.
The Commission would do well to reconsider.
You would do well to tell it to him in advance.
If you can do something, you may as well do it to him.
It was a valuable lesson that we would do well to learn.
That is something we would do well to recognise.
That is something that the European institutions would do well to recognise.