The only one which is a little unusual is 6, though I don't think I could call it a mistake. When there is an event in the very recent past which you are referring to with some urgency or emphasis (which "right now" conveys), then the past simple is the more natural choice as opposed to the present perfect.

"Right now" is "in this moment" so it does not make sense to combine with a past-tense verb or a future-tense verb. 1 and 6 are incorrect because the verbs are in past tense. 4 is incorrect because the verb is in future tense. 2, 3, and 5 are correct English.