I like your choices for the first two sequels, but no black suit, Venom, or Carnage in any of the films connected to MCU, please. Leave that stuff for the Sony Marvel Universe if they want to go 90s edge.
I think it's a good idea to have the Osborns, Dr. Connors, and Octavius around as characters in the world, but not as the main villains for a while to give some distance with the previous movies. Kingpin should also be used if he can be borrowed from the Netflix series. If not, the version of Tombstone that they did in Spectacular is a fine substitute. Mob elements in Spidey anyway, that's important.
So:
Homecoming: Vulture, Shocker, Tinkerer
SM2: Scorpion and Rhino, then Kraven for the 3rd act.
SM3: Mysterio, Black Cat, with Black Cat becoming a sometimes villain and sometimes ally in future movies.
SM4: Green Goblin and the mob.
SM5: Lizard as a sympathetic villain that Peter tries to save and Dr. Octopus as a remorseless killer that Peter has to stop.
SM6: Sinister Six with Vulture, Shocker Scorpion, Rhino, Mysterio, and Doc Ock. Needs to be villains he's already encountered.