As with most species, we probably all recommend our favourites.
What are your circumstances, plans and objectives? If it's meat for yourself, then carcase quality will be less of an issue so you'd probably go for a super-tasty breed that's fun to keep, eg., GOS, OSB, Berkshire. If you want to sell to butchers, back fat will need to be under 20mm, so you'd probably do better with something like uncastrated male Lops.
What you can readily source locally may well dictate your choices.