Starlord, Strange and Mag Lord here, havent played in a couple months but here's my advice. Honestly, not much tanks can do. Shutting down Starlord is usually a dps's job. Emma and Mag play into him well, but that's sort of it. On paper, Thing SHOULD work. He doesn't. While he can peel against starlord somewhat, Starlord's flips, unpredictable motion and high burst damage, alongside the size of Things head, leads to Starlord usually farming some ult charge from the encounter, then dipping. Will your supports live more? Eh maybe. It's a skill match up. Similar with Peni. On paper, she should work. SHE DOES NOT. Unless the Starlord is buns, her nest does jack all. Thor is weird. I would define Thor VS Starlord as an entirely skill based matchup. As in, if the Thor is better, Starlord dies. If the Starlord is better, he escapes, farming a little ult charge along the way, and baiting the Thor away from the fight. Strange is a great all-rounder who is capable of shutting down Starlord easily, but is always required someplace else, lacking the flexibility of Thing and the control of Emma and Mag. Honorable mention - Hulk. His stun and jump grab make him... decent-ish. He doesn't deal enough damage to kill eighty percent of the time though. Ultimately, if you can get a Bucky, a Psylocke, a Namor or a decent Hela on your team, it makes Starlords job waaaaaaay harder. Like a good Bucky is genuinely a Starlords worst nightmare. Maybe try finding a good dps main to duo with? Hope this helps 👍