I dont know if you are playing 5e with those restrictions, but I'd sure like to see the write-up of your available classes/archetypes. I'm always trying to de-kitchen-sink-ing my take on the Forgotten realms and I think that would be an interesting way of doing it.
Not the one addressed but here is my take on how I would do FR:
Use the lore a bit to your advantage, elves have withdrawn to evermeet, so that should reduce the elvanisation of adventurers step 1 ban elves, allow halfelves though.
Ban either halflings or gnomes (not both of them), in Greyhawk I allow gnomes in FR I would tend to allow halflings rather.
Dwarves are not so withdrawn, so allow them. I dislike the RAW take on mountain dwarves though, it makes dwarves stronger than humans in the beginning so I would allow only hill dwarves. For me a dwarf is a bag of hitpoints (not meant negatively, I like dwarves), but not an Arnold.
Humans, of course. If you want to play with feats make variant human mandatory not optional.
Stranger stuff: Tieflings, yeah the chances for them to appear are quite high since all the meddling of Asmodeus so well, include them if you want to.
Drow? No, of couse not, drow are monsters.
Halforcs? same.
Lizardmen ah I meant egglaying Draconian aeh Dragonborn? To much Krynn for my take on FR, ban. do not use them as NPCs either.
So, classes (and allowed Combos):
Allow Wizard (Any school) Humans and Halfelves Tiefling, Illusionist for halflings (or gnomes)
Sorc (Dragon and Wildmagic) Human Tiefling(Wildmagic only)
Cleric (reduce your pantheon available as cleric deities to pcs, you can discuss player preference though, just include the players desired deity and leave some other for NPC only) pick something useful for each domain, e.g. Gond, Mystra, Tyr, and some more, I cannot go into detail atm.). Every race except Tiefling
Bard (the PHB options) Human, Halfelf, Tiefling
Warlock Human, Halfelf, Tiefling, Patron Nature and Abyss/Hell, nothing else.
Paladin Human only has to be of Torm (The classic variant)
Ranger Human Halfelf maybe Halfling, pick some nature god for that one.
Fighter every race, but Halfelf EK only
Rogue every race but dwarf, but Assa / AT human Tiefling halfelf only,
Barbarian? Human only, if at all.
Monk Human and Dwarf only, if at all.
Druid human halfelf only, moon and land.
So that one for a rough start, that's the way if you want to restrict to something which does not require shoehorn or constructed explanations for strange combinations