And there's the problem with recommending find for a single fun...

I can't stand flexy single fins. More base, less tip, less rake - that's my preference.
And yet I have a mate who much prefers the fin style recommended by Surf69. Maybe it's the gruntier waves I surf (my mate is metro based). He reckons my fins are stiff; I reckon his are twitchy and lacking in pure carving lines.
But really, you should get a good fin you think you will like, move it around a bit. Find the sweet spot for you.
Then get another fin that's different. And figure out what you like.
I don't think Surf69 and I are saying anything different about the way different fins perform btw. He just prefers different things to me. All the fins he mentions have excellent reputations. I have often drooled over the Alkali fins.
Hope that's confused everything enough.