I hate group checks for this kind of thing. I mainly only use them for perception or knowledge checks (always fun when one person is oblivious). For group tests like stealth or athletics for a chase it’s probably better to either build a challenge out of it so other skills can apply and more checks balance the luck factor, or just let one player be skill leader and make the check with appropriate penalties if part of their challenge is managing the clanky loud orc in plate.