> Anything with a fan will be "better". It will not be more efficient.
You are using some strange definition of "efficient" but okay. Let's continue to ignore practicalities like launch mass and volume, material cost, and serviceability too while we're at it.
Spacecraft thermal control system in all but the most trivial arrangements require power too. You need to get the heat from inside where it's being generated to the panels, and that requires active coolant loops with pumps. Passive heat pipes will only get you so far (literally, like a meter or two at best without gravity to assist fluid movement) and have pretty limited capacity.
A single ~100W fan can dissipate over 40KW of thermal load from an automotive radiator. According to publications by NASA, the ISS thermal management system has two pump assemblies that consume 275 watts and can dissipate up to 6KW. I'll leave you to do that math. Even if you triple the power (which as absurd) for a air-water radiator arguing that you also need to pump water on the inside, they still win handily.
And since you implied cooling towers earlier; I can tell you from professional experience that an evaporative crossflow cooling tower like you'd see at a data center can easily reject about 10 megawatts of thermal power with just 30-40 horsepower (~30kw) worth of fans and pumps.
I'll say it again: Thermal radiators are dogshit. If you want to move heat quickly and efficiently, you need mass transport. The only reason spacecraft use thermal radiator panels is because there is literally no other choice.
=Smidge=