I have a soft spot for the early route Pokemon so I've used a lot of them in my playthroughs and entered many different Hall of Fames with them.
The Hall of Famers: I've used every regional bird except for Pidove and Rookidee lines. Not sure if it's considered to be a regional bird but I also used Spearow/Fearow. Then I've also used a few of the early bugs since I love the Bug type in general so I don't mind using even the weaker early route bugs on my teams. I've used Caterpie and Weedle lines in Kanto, Wurmple (Dustox) and Surskit lines in Hoenn and Sewaddle line in Unova. I also used Mankey and male Nidoran lines (if they count) in Kanto, Mareep and Wooper lines in Johto, Lotad and Wingull lines in Hoenn, Lillipup line in Unova and Chewtle line in Galar and they were all great Pokemon to have on the team. I also had a great Sentret/Furret in my Crystal Nuzlocke that helped me beat the challenge and survived all the way until the end, and it even saved me a few times after my starter died (i.e. against Morty, Rollout OP) so I have a lot of love and respect for the Sentret line.
Then I used almost all of the rest early route Pokemon for like the first few Gyms or as HM slaves before eventually putting them in the PC.
HM users: Zigzagoon, Bidoof and Patrat lines are my go-to HM users in their regions, Taillow and Pidove are usually my Fly users in their regions,...
Early game heroes: Last but not least I used Purrloin, Rattata, Poochyena, Wurmple (Beautifly), Bidoof, Shinx, Scatterbug, Ledyba and Nickit lines on some of my teams for at least the first few Gyms but I didn't keep them long term so they never entered any of the Hall of Fames with me, however they were great during the time they were on the team (ok, maybe not Ledyba but it was cute at least).