For the Knights of the roundtable the line up is Gawain, Lancelot , Tristan, Percival, Mordred and Artoria Alter, Twelve Paldins have Charlemage, Roland, Astolfo and Bradamante. The Argonauts have Archer Heracles, Jason, Medea, Atalanta, Aclepius and Caenis

Just thought another second about how strong the argonauts would be

That's fair, because lets face it the Argonauts minus Jason are all extremely powerful you got Medea stated by Soloman to be one of the best mages, Heracles the strongest hero in all Greece and one the most powerful heroic spirits, Caenies who's almost unbeatable at sea and is isnaly strong, but If I'm being honest Greece is probly the second stringest place if we're going by servants and how strong they are, mainly because Mesoptomia exists and every servant from there is Broken to high hell,

Tbh, it depends on which version of what we're talking about.

If it's Fate/strange fake Gilgamesh and Enkidu, the Argonauts may win. If it is Fate/stay night Gil, then the Argonauts will definitely win. If it's Extella timeline Gil, then Gil and Enkidu win

Now, the Knights of the Round Table are tricky, but it mostly depends on which version of Artoria we're talking about. If it's unsealed Artoria from Fate/stay night, then no. Same for Arthur Pendragon, Artoria Alter, Artoria Lancer/Ruler, Artoria Lancer Alter, and Artoria Archer but, it could depend if you give her Avalon. You could make a case for the Knights of the Round Table from the Camelot Singularity. If it's Fate/Extella Artoria, then all of them are getting no diffed since she's comparable or superior to BB. And Artoria Avalon aka Artoria Caster could probably pull it off.

No offense, most of the Paladins are fodders.