Opsive’s Behavior Designer Movement pack has a* versions available. They work well. Emerald AI’s dev has indicated intention of adding a*pp integration but doesn’t yet support it. As for Elliott, sorry, no idea
Elliot’s store says it does… just trying to confirm with the developer of this forum. Sometimes an asset in the Asset store says it’s integrated and it’s not… or the integration is old.
FYI - The developer of Elliot is coming out with a new version of his asset that works with Unity 2019.3 and higher. It will be a separate assets ie. Elliot 2 and not just an update of his current asset. The current version does not worth with Unity 2019.3