Most gamepads are pretty close to the same size, as it's meant to be a one-sided fits all egro solution.
Do you have any controllers that you do enjoy using?
The HORI split pad compact or perhaps one of 8bitdos Lite or SN30 controllers might work?
The compact slots on to the system like joycons, but can be used separately as a wired controller with an adapter.
https://www.amazon.com/HORI-Switch-Split-Compact-Light-Yellow/dp/B0B5LX9RQV/