Thanks to the fact that symbiotes exist everywhere, and that Marvel citizens tend to have some underlying traits that can spring to life to make them supers I came up with some ocs. Think: the symbiote awaken whatever dormant mutant gene, inhuman gene, or magical genetics that the average citizen might have.
Fever: A fire/heat based symbiote. Making them immune to one of the weakness of klyntar and using it as a weapon.
Chills, a cryokinetic symbiote that uses cold as a weapon.
Bile, an acid using symbiote that turns the green waste they spit out as a weapon.
Tinnitus, like Fever, is a symbiote that became immune to another weakness in this case 'loud noises!' and uses them in turn.
Quarantine: Think Anti-Venom but an actual symbiote. They're able to separate symbiote from their hosts, and even cut them off from the hive-mind.