Genuine Molex brand tools will run you several hundred $$.

Everything here depends on your definition of 'good'.
Excellent ones are the Sargent tools 3100 series crimpers as found here:
https://www.greatplainselectronics.com/products.asp?cat=80
3136-CT is awesome due to the tools locator. The locator holds the contact at the right position and includes proper wire stop.

Decent crimpers would be something like the Sargent 1000 series such as the 1026-CT.

Soso crimpers would be the Waldom W-HT-19xx as found here:
https://www.greatplainselectronics.com/products.asp?cat=59
Some people swear by the Waldoms... other people swear at the Waldoms.

There are some Chinese brands that people will be adding to the thread but I don't use any of those.

3133-CT is a regular stocked crimper for us.
We (GPE) are out of the common sizes right now but are working on a new order this week. I see I opened a purchase order in June but never submitted it. Apparently dropped the ball on that one.

I haven't submitted an order since last winter and never got their price list for this year. Kind of scared to see what they're currently charging for a case of crimpers.