tank mate suggestions?

Anybody have any suggestions for some tank mates for my tank?

I have a 75g, sand bottom, big fire eel, 5" delhezi poly, 3" endlicheri poly, 6 1.5" clown loaches, 3 black skirt tetras, 1 red-finned botia, 3.5" Tiger Lobster (so shy you can't even find him, so aggression isnt an issue), 4" pleco.

Any suggestions? I'd really just like a couple larger fish, i was thinking about two big Gold Sevs. Somebody said alligator gars, but those get waayyyy too big.

What do you think?

not worried about it honestly, the lobster barely even moves out of his rock, like i worry about him EATING more than pinching, lol. im not attached to the tetras obviously, they are just there cuz i had them from the old tank and actually look pretty nice

nah, the pleco is nice looking, but he literally doesnt move from under this piece of wood, its pretty lame. i still have plenty of room for other fish, just gotta figure out something i really want. gold sevs are beautiful fish and not aggressive at all, BUT, i think they would go after the lobster (if they could find him). or a green sev and a gold, but then again gars on the top would be nice. ANYTHING that stays on top would be nice actually.

i love knives, i used to have a royal knife and he was BEAUTIFUL. but they do mess with other fish too, even the brown knives, plus, thats another fish thats gonna stay mostly at the bottom.