I am assuming you're not five years old, cuz some of these clips have blood. If I get reported, I'm finding you... Anyways, Tanjiro has overall much better speed and AP. Eren in titan form might give him some trouble due to size, strength, and dura, but titans wouldn't be really hard to kill for someone like Tanjiro, so he could easily reach the nape and cut him there, due to the transparent world being able to detect weaknesses. Founding titan is slightly harder, but none of the titans actually stand a chance against him, so he can speed through and climb the main body to just end him there. Titan durability isn't much, it can be cut by random people swinging around. Overall, I think his strength is more than a landslide, but attacks are ineffective if you can't hit your opponent, I don't see Eren being able to. Tanjiro's also not an idiot, he can slice the legs or something to knock it off balance, etc. I don't really see Eren winning this. Scaling aside, I actually really like how this edit turned out.
