While by definition, ALL fanfics are NOT Canon and why there will be no "Category:Canon", some fics are written without impacting or disrupting Canon at all. They can be set either prior to, during, or even after Canon, and nothing about them upsets, contradicts, or contravenes Canon.
This would include things like Kim and Ron breaking up and developing relationships other than each other, so long as it is all developments which occur after Canon.
These fics fit Canon Intact, even if they then move into the realms of Crossover and or Fusion, which may be applied as appropriate.
However ignoring ANY part of Canon disqualifies for this Category; then consider if a case of Category:Broken Canon.