Wheel loaders

Excavators are good but wheel loader can pick up more stuff like this on for the big transporter

Agreed completely! this game NEEDS wheel loaders. they could even design them to not be able dig lower then grade as to not make the excavators useless. something like triple the scoop size of the same size excavator, but without the ability to dig down, allowing them to scoop products from stackers (especially the new ones) to load trucks from "stockpiles" of materials

Yeah sometimes wheel loaders would be REALLY nice to have! It goes from grading the ground to large excavations to pushing material into the ocean or a hole or similar so that the dump trucks dont have to go close to the edge and risk getting stuck there because they block their own way.
Especially when they come in three sizes like the excavators.
Tier 1: Skidd Steer. (A big one, like a ASV RT-135)
Tier 2: Volvo L260
Tier 3: Caterpillar 996
Plus there could be tree planting and cutting versions of a wheel loader.