The last time someone started a thread like this, someone mentioned Rosemarie Ford who used to do the Generation Game with Bruce.
She's a dancer, so she would be amazing, I think.
I definitely don't want Alesha, lovely girl, but that cackling is too intrusive. The presenter should be just that, someone who frames the celebs, not dominates them. I'd actually prefer Zoe Ball of the previous contestants, she has previous presenting experience at least.
Samantha Harris does a really good job in the US, I think you need someone like her.