Nah, The Best Squad Mate is the one that You personally like the most. It could be Miranda, Liara, Tali'zorha or even Grunt. For me I adore Tali & Grunt as a team , and Tali as my Romance partner. I do still like Liara & Ash a lot , but Tali with those sweet , hot Thicc Dancing Thighs just makes me melt.

No. Garrus is :)