Congratulations!! 
WOW!! I [name_u]LOVE[/name_u] your Naming Style! More than half your Names are on my Favourites and Top 10 Lists too and I have never been able to find a clear Name for my Style either, so I’m afraid I can’t help you with that, sorry!
Here are my thoughts and rankings for each Name:
[name_m]Gulliver[/name_m] - 7/10. I [name_u]LOVE[/name_u] [name_m]Gulliver[/name_m] as a Name but took it off my list (and took 3 points off its rating) because of the hideous meaning “glutton”! [name_m]Gulliver[/name_m] sounds feisty, fun, adventurous, courageous, and works wonderfully for any age.
[name_m]Rafferty[/name_m] - 10/10! A FABULOUS Name in every way with the same feel as [name_m]Gulliver[/name_m], but a MUCH better meaning “floodtide, abundance, prosperity”! [name_m]Rafferty[/name_m] also feels cheeky and cheerful and has the gorgeous Nickname [name_m]Raff[/name_m]!
[name_m]Theodore[/name_m] - 10/10! BRILLIANT Name, perfect for any age, with a FABULOUS meaning “gift of God”!! [name_m]Theodore[/name_m] sounds wise, kind, strong, decent, gentle, and trustworthy. Awesome Nicknames [name_u]Theo[/name_u], [name_u]Teddy[/name_u], [name_m]Teo[/name_m], Ted, etc give a light hearted, playful, relaxed feel to serious [name_m]Theodore[/name_m]!
[name_m]Frederick[/name_m] - 10/10! I [name_u]LOVE[/name_u] [name_m]Frederick[/name_m] and Nicknames [name_u]Freddy[/name_u], [name_m]Fred[/name_m], [name_m]Rick[/name_m], etc, for exactly the same reasons as [name_m]Theodore[/name_m], plus [name_u]Freddy[/name_u] is my Husband’s Nickname! 
[name_m]Gideon[/name_m] - 5/10. I have EXACTLY the same issue with [name_m]Gideon[/name_m] that I did with [name_m]Gulliver[/name_m], the horribleness of its meaning! I also took two points off because I feel like [name_m]Gideon[/name_m] has the seriousness of [name_m]Theodore[/name_m] and [name_m]Frederick[/name_m] but lacks their softness, gentleness and kindness, and the playful Nicknames, although I guess you could use the slightly silly Giddy, or serious [name_m]Deon[/name_m]. [name_m]Gideon[/name_m] is kind of like the grumpy Big Brother of [name_m]Theodore[/name_m] and [name_m]Frederick[/name_m]!
[name_m]Felix[/name_m] - I [name_u]LOVE[/name_u] [name_u]LOVE[/name_u] [name_u]LOVE[/name_u] [name_m]Felix[/name_m] (it’s in my Top 10 along with [name_m]Frederick[/name_m]/Friederich, [name_m]Theodore[/name_m] and [name_m]Rupert[/name_m]!)!! For me it has EVERYTHING: perfect for any age, wonderful meaning, playful, friendly, fun, romantic, easy to fit in Internationally with a universal pronunciation and feel!
[name_m]Arthur[/name_m] - 9/10. I [name_u]LOVE[/name_u] [name_m]Arthur[/name_m] because it was my Grandfather’s Name but, therefore, it also loses just one point as I CANNOT picture it on anyone under 60! Warm, sweet and regal, with a nice meaning and Nicknames, especially our special Nickname for my Grandpa “Arpi”!
[name_m]Winston[/name_m] - 5/10. Unfortunately I can’t get past [name_m]Winston[/name_m] [name_m]Churchill[/name_m] with this Name, but would probably really like it if I knew a great [name_m]Winston[/name_m] as I love the Name [name_m]Winton[/name_m] because of the AWESOME Trumpeter [name_m]Wynton[/name_m] Marsalis!
[name_m]Leopold[/name_m] - 5/10. For no reason I can explain, I can never imagine a [name_m]Leopold[/name_m] as a real person, it just seems so ridiculously formal as a Name, but not awful at all!
[name_m]Magnus[/name_m] - 7/10. This is a groovy, chunky, supersized feeling Name! A bit too “BIG” for me to ever consider using, but I do like it!
[name_m]Fletcher[/name_m] - 3/10. Really not my style, sorry. I think it just feels too modern and I really prefer Old Fashioned or timeless Names.
[name_m]Linus[/name_m] - 1/10. I love the [name_u]Charlie[/name_u] [name_m]Brown[/name_m] Character but, to me, [name_m]Linus[/name_m] sounds like Sinus.
[name_m]Rupert[/name_m] - 10/10! Another absolute favourite of mine! [name_m]Rupert[/name_m] is classy but also a bit goofy, energetic, fun and playful! With a great meaning and some cute Nicknames, it works terrifically for any age.
Maybes:
[name_u]Alfie[/name_u]/[name_m]Alfred[/name_m] - 7/10 / 2/10. I think [name_u]Alfie[/name_u] is terrific, though not as a stand alone Name, but [name_m]Alfred[/name_m] just makes me think of a grumpy old man, sorry! I love [name_u]Alfie[/name_u] as a Nickname for Alphaeus! Still a bit grown up sounding for anyone under 30, but that’s where gorgeous [name_u]Alfie[/name_u] comes in! 
[name_m]Abel[/name_m] - 3/10. [name_m]Just[/name_m] not my style, sorry.
[name_m]Cormac[/name_m] - 5/10. Not really my style but it is growing on me and has an energetic feel which I like! 
[name_m]MacArthur[/name_m] - 4/10. I just can’t get past [name_m]General[/name_m] [name_m]MacArthur[/name_m], sorry.
[name_m]Walter[/name_m] - 3/10. Our Family has an ongoing joke about a Walrus called [name_m]Walter[/name_m] getting married “[name_m]Walter[/name_m], [name_m]Walter[/name_m], meet me at the altar!” etc, so that is what I think of with this Name, sorry!
Here are some of my other Top 10 favourites which you might like:
[name_m]Asher[/name_m]
[name_m]Hugo[/name_m]
[name_m]Thaddeus[/name_m]
[name_m]Anthony[/name_m]
[name_m]Matteo[/name_m]