If you try to apply the idea you've just explained , you'll find it hard to switch between different sounnds since you'll sometimes need pressing the two pedals simultaneously, unless you use A/B switch boxes and stuff like that , and as you use more pedals your simple rig will turn into a realy complicated one that you'll probably need diagrams to set it up each time !
I guess what you need is a multi-effect processor which can do exactly what you need and dramaticaly change your tone in real time .
Personaly , I'd recomend Boss Gt-x series or Digitech GNX-x series ... These are the highest quality affordable units .