Hi, I've made a mod for those who like Keene as much as I do.

Keene companion mod includes:
~ companion wheel,
~ vanilla voiced dialogue,
~ Keene's stealthboying while player is sneaking,
~ Keene's perk

Compatibility: I think it won't mess with anything, unless other mods that changes Keene's script, etc. My game was heavily, heavily modded and everything was just fine.

Known issues: Sometimes his vanilla quest dialogues won't show up. If it happens, you'll just have to talk to him about his tactics, choose "enough about tactics", and just like that the vanilla dialogues should appear.

Other stuff: Feel free to do with it whatever you want. Just let me know, or credit me somewhere.