give your heart a break by demi lavato
airplane
to me I'll say chester bennington or mike shinoda from linkin park or busta ryhms
There are thousands of good songs out there. I hardly doubt memory is a thing you have to work around. If that is the case, just add songs that you love. Simple as that. Also I dont belive age should...
I would say that a good song for a person with a medium vocal range would be some simple stuff like the beatles or depeche mode