scott, there is a kitchen gadget made to de-cob corn with a curved blade.
the sweet corn we prepare tastes pretty fresh. blanching.......you don't need to boil the heck out of it.....and give lots of room for the cobs, don't pile them all in your pot, do a few at a time.... bring water to about a boil, put your cobs in shut the heat down a little, 4-5 minutes is good enough even for larger cobs. ice bath about the same amount of time.....4-5 minutes that's it. ziploc, get the air out, or vaccum bags. freeze.
frozen cobs straight from the field or, blanched and frozen cobs gets you soggy corn......yuk!