We just got our first Corgi and hes a fluffy and as others have said, we use a dematting blade to trim up any parts that are scraggly.
Obviously he doesnt get to look as great as when he comes back from spa day but its good for the in-between.
We have also tried other tools like a slicker brush, a bamboo one, a loop blade and electric trimmers-these were tough as he never sits still
and a rake which loosens things up...he likes to eat all the brush handles..but he doesnt mind "getting handsome" for the ladies
the dematter is the best for cleaning him up all over...we just love it....but we also make sure to do it outside as we can usually make a whole new colby with what comes out!!!
Good Luck