@Ragabul: It's hard for me to imagine an asari wrestling. xD The krogan would probably beat almost everyone if they were included. MainShep would totally fight Grunt for fun though, training her krogan "little brother."
And now I just imagined Calix doing a krogan headbutt. It involves a biotic jump to even reach the krogan's head.
@kglaser: I'm probably going to leave the team as Tali and Garrus because it works so well, aside from Garrus getting a lot of the quotes on my Tali playthrough. Tali goes on all of the missions, then for the other squadmates - Kaidan got one (Feros), Garrus gets two (Noveria and Therum), and Wrex gets two (Virmire and Ilos/Citadel). It sets a nice balance that all of his friends get to go on missions with him. And I asked here just to make sure that Tali would be the one who speaks up when he's about to kill the rachni queen. Even if Garrus gets all of the other lines, it'll still be a powerful moment.
Maybe there are just some missions that certain squadmates take priority. Like Tali speaking up on Feros, which had focus on the geth, and Garrus speaking up on Noveria, with all of its politics and Saren-related stuff.