From my tests, there is no point in using gameconfig or lod mods. The only way to solve this problem is with some dll or .asi that forces the game to generate peds/animals/train/wagon before anything else, including before the landscape. Note that when you use mods like whyem dlc or stream files, things start to appear almost too close (pop-in) like animals and plants. I.e, the game cannot generate textures that are further away. Even with lod generation mods, wildlife or peds/wagon/trains are not generated. And if they are generated, it is with pop-in or only half (wagon without passengers).
Unfortunately the only way is to use mods that do not add new textures. And even if you want to use them, only use Stream files. However when equipping the character, I recommend using only one or two pieces of mod clothing and the others vanilla.