I'd definately keep Dot. I guess I'd keep stripe and rose too. I'd part with the others and use the space for either new FH's or for future batches of fry from breeding Dot and Stripe.
If I were you, I'd keep UB, Stripe, and if there's still room, Dot can stay. And if there's still more room, Sparkle can stay too. I think Sparkle is a female.