2 hammers work really well. When all else fails, bring out the precision tools!!!!!
Take one plastic hammer, put plastic head contacting the oil filter cover, take small ball peen and proceed to tap the plastic hammer. You will see the cover moving. Takes no more than 5 or 6 taps and then it's hand loose.
For the oil filter itself, you can buy work gloves that have a rubberized palm and fingers on them to prevent slippage. They're made for handling wet stuff. Grip filter and turn. Easy peasy.