I use a spot with shadows enabled to recreate sunlight. I also use directional light source to bright up dark spots a little bit, but for sunlight I use a spot. Only downside is, when you have a very big environment, then you would be very limited with a spot light. But in my opinion, it's the best to recreate sunlight. But I think this is also situational and what kind of environment, you use. My best setup is, 1 spot for sunlight, 1 directional light for lighting up darker spots and then I have 4 spots left for the characters.
Here is a example, I put something together very fast. I'm only using 2 light sources.
With sunlight (spot) You can see the shadows from windows and other objects. And illuminates the sunlight directly on the character, just like real life.
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Without sunlight
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Sunlight (directional) You can see that the environment is a little bit brighter but no shadows from objects or windows.
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