I'm using a self-made mod that lets you choose in-game whether you want to be the dragonborn, leaves everything intact if you say yes, but disables word walls, makes dragon corpses inert, blocks certain dialogue and changes the Dragon Rising quest if you say no. It was a little rough around the edges, but I bet I could remake it now and make it perfect. Would people be interested in using such a mod? The only other main quest stoppers that were online at the time all went about deleting the word wall activators and cutting out parts of vanilla scripts.

If it's the one I think it is, then I'm currently using it now...or something very similar. Either way, yeah, I'd use it. Tried using the alternate start mod but it just wasn't my taste.