The main ones in question are death mark and recon mark. I've noticed nowhere really seems to talk about these status effects or what they do. I'm not even 100% certain myself. Having said that, they're mentioned in the lockdown and ghostmane stalker articles at least, and I know they're caused by both the ghostmane stalkers and the rangers summoned via signal flare. If someone could hash out exactly what these do and add them to the status effects page, that'd be extremely helpful. There may be others missing as well, such as the swarm infection debuff.

Beyond that, we don't currently have positive status effects listed anywhere on the wiki that I see. These would include speed, damage, and defense buffs, emergency revive, swarm infection (only applies to mobs, but still a positive effect with an icon), etc. It could include the sprite-based buffs as well, but I don't think any of those have associated icons and could easily be skipped over for the purpose of the wiki article.