Remember when someone had say that team jojo would obviously won tier 8 tournament or something like that? Ok there is something far more overpowered in tier 8 than JJBA and that thing is Umineko No Nako Koro!
Goalie :
Dlanor A. Knox (She can just summon Cornelia and Gertrude, who will create thier forcefield to seal the The goal protect it from any attemp to goaling)
Defenders :
Ronove (His forcefield might be usefull even in only defense and not a goalie),
Shannon (For her forcefield creartion like Ronove and also her Power nulifiction may be usefull),
Virgilia (I guess that might be a weird place but Virgilia can and probably will create giants to help her out, she have many other usefull haxs but unless I miss something she do not use most of that In character that why I put her just here)
Midfielders :
Three of The Chiester Sisters (00, 45, 410) (So I don't have many ideas here, Jessica sound weird in that place and Teamwork is something hard for the Seven Stakes, so the Chiester Sisters sound a interesting and good choice)
Forwards :
Gaap (her portals will ver helpfull in that position),
Rosa Ushiromiya,
Kanon.
Umineko team may not seems that overpowered, unless you see the hax wall that Virgilia have, but here will come the one that will make that team super overpowered. It is the one and the only leteraly one of the biggest smurfs in the all of the wiki Goat Theory!!!
Goat Theory will just ignore any supernatural ability used by the opponent team defense and Goalie with his endless nine.
Coach :
Beatrice (She is a Supergenius, the highest level of intelegence, not counting omnisience and night-omnisience, Beato is a clever, strategic and unpredictable person, she may not have experience in that field but she can see that soccer match as a chess match and made many plans based in that)
Honnestly all the team exept maybe Dlanor seems Irrelevant when the Goat is there lol.