getClosestPlayers()

-- Should be in a LocalScript
local nearRadiusCutoff = 10
local localPlayer = game.Players.LocalPlayer

local function hasLivingCharacter(player)
    if (player.Character) then
        if (player.Character:FindFirstChild("Humanoid")) then
            return player.Character.Humanoid.Health > 1.5
        end
    end
    return false
end

local function getClosestPlayers()
    local nearbyPlayers = {}
    for _, player in pairs(game.Players:GetPlayers()) do
        if (hasLivingCharacter(player)) then
            local distanceFromLocalChar = localPlayer:DistanceFromCharacter(player.Character.Torso.Position)
            if (distanceFromLocalChar > 0 and distanceFromLocalChar <= nearRadiusCutoff) then
                -- We check if it's greater than 0 too because DistanceFromCharacter returns 0 if LocalPlayer has no character.
                table.insert(nearbyPlayers, player)
            end
        end
    end
    return nearbyPlayers
end

local PlayersCloseToLocalChar = getClosestPlayers()
for _, player in pairs(PlayersCloseToLocalChar) do
    print("Message about 'player' being close here.")
end