If you want heavier switches then you're pretty much going to have to go for a board with clicky tactile switches as MX Greens and MX Whites are the only MX switches heavier than MX Blacks.
MX White switches are pretty rare, so finding a board with them can be difficult, there was a Ducky Shine 3 Yellow Edition with MX White switches, however it's hard to find them.
As for suggestions of an MX Green board, you have a few more options:
- WASD V2
- WASD V2 CODE
- CM QuickFire XT
- Ducky Shine 3
- Ducky Tuhaojin
In addition to those, there are a few other options that are harder to find such as the CM Storm Trigger, CM QuickFire Rapid/ Stealth.
Other than that you could consider doing a switch swap and getting some legitimately heavy switches like MX Linear Greys, or if you wanted even heavier than that, you could try and get some 120g springs from a groupbuy which you could put in the switches to make them twice as heavy as what you have at the moment.