Ignoring special forms (like Partner Eevee, who can't evolve anyway), here are the Top 10 1st stage Pokémon with the highest Base Stat Totals (BSTs), from greatest to least.
I apologize if this isn't formatted amazingly, because there are many ties.
In addition, this is slightly edited, as I forgot about Type: Null (Thanks SadisticMystic) & Scyther (Thanks CC)
1) Type: Null - 534 BST
2) Scyther - 500 BST
3) Misdreavus - 435 BST & Tangela - 435 BST
5) Sneasel - 430 BST & Gligar - 430 BST
7) Corsola (Johtonian and Galarian) - 410 BST & Ponyta (Kantonian and Galarian) - 410 BST
9) Murkrow - 405 BST
10) Archen - 401 BST
(Now Honorable Mentions)
11) Wailmer - 400 BST
12) Porygon - 395 BST
Also, Honerable Mentions go to Yanma and Munchlax, who both got 13th place, with BSTs of 390.
I Hope I Helped, and I am sorry if I missed something (please let me know in the comments if I got something incorrect)!