I mean Melee had like 14, Brawl had 18, and Smash 4 had 14 in base without the Miis and 17 with them, so that's pretty typical outside of Ultimate's like 6 at base (11 with Echoes counted).
Melee's depends on how you count the clones potentially, so might not be typical here, but yeah.
For the sake of argument, here are totals with clones not counted.
Smash 64: 11 (because of Luigi)
Melee: 8 (because of Dr. Mario, Ganondorf, Young Link, Falco, Pichu, and Roy)
Brawl: 15-17 (because of Toon Link and depending on which way you count Wolf and Lucas)
Smash 4: 15 at base (because of Lucina and Dark Pit, counting each Mii separately)
Ultimate: 5-6 at base (because of Daisy, Dark Samus, Chrom, Ken, and Richter being Echoes, range is dependent on how you count Isabelle)