Of the 3 lists you've got, I like the first.
Because everything is so fast... you can quickly flank virtually anyone at any point of the game. Sniping to help dictate where the enemy moves to is fun, or pin them behind LOS blocking terrain because they are too afraid to step out..... at which point it's too late.
There's gotta be a way to incorporate Mecha Porkchop with these lists (sparks loves him and his scrap markers), not because he's unbelievable or anything... I just think he looks awesome.
Honestly a staple for me is....
Earl, Sparks, Rami + anything you'd love to make fast.
Your model count for a gremlin list seems relatively low, however, they are pretty hard hitting (which I'm not used to as a Gremlin player). I personally try to out activate my opponent.
Also... I too want to see whiskey golem be.... "extra" fast.