Can you guys help me with the most comprehensive asset packs available for free?

For example, if I wanted to make an RPG and needed characters, buildings, scenery, enemies, weapons and would use asset packs to make my game, then get an artist to replace some things with custom assets.

I'm a programmer only, I couldn't make a good 2D sprite or 3D model to save my life. I can do interfaces and Huds though.

They don't have to be rpg specific, that was just an example. But it'd be great if the packs were comprehensive enough that they contained nearly everything needed for the type of game, so the style would be consistent.

They don't have to be assets that can be used commercially, or they can be. I just want to start building a game when I'm able without having to use blocks.

If there's assets from unreal or other engines that are unity compatible, feel free to include them.

I just can't get creative with blocks and spheres. Never have been able to in 14 years of programming.

PS: I'm not being lazy and asking you to search for me. I've just been out of the loop so long that I can't see the wood for the trees.

Thank you all so much!