I quite like the nn [name_m]Rick[/name_m]/[name_u]Ricky[/name_u], but I don’t care for [name_m]Richard[/name_m]. Which of these longer names do you like best? Are there any great options in missing?
Emeric
[name_m]Cedric[/name_m]
[name_m]Frederick[/name_m]
[name_m]Dietrich[/name_m]
[name_u]Jericho[/name_u]
[name_m]Eric[/name_m]
Of those, [name_u]Jericho[/name_u]
These also work:
[name_m]Merrick[/name_m]
[name_m]Alaric[/name_m]
[name_m]Maverick[/name_m]
[name_m]Broderick[/name_m]
Henrick
Godric
I like [name_u]Jericho[/name_u]. 
Emeric, [name_m]Cedric[/name_m] and [name_u]Jericho[/name_u], I have a serious love for [name_m]Maverick[/name_m] could also be an option, but I know this name gets a lot of contrasting opinions.
From your list, I love [name_m]Cedric[/name_m] and [name_m]Eric[/name_m], but I also really like Emeric and [name_u]Jericho[/name_u]!
Some more possibilities:
[name_m]Aldric[/name_m], [name_m]Aldrich[/name_m]. [name_u]America[/name_u], [name_m]Audric[/name_m]
[name_m]Carmichael[/name_m], Carrick, [name_m]Chadrick[/name_m]
[name_m]Demetric[/name_m], [name_m]Derrick[/name_m]/[name_m]Derek[/name_m]
[name_m]Eldrick[/name_m], [name_m]Ericson[/name_m]
[name_m]Fitzpatrick[/name_m], [name_m]Fredrickson[/name_m]
[name_m]Garrick[/name_m]
[name_m]Hendrick[/name_m], [name_m]Hendrix[/name_m]
[name_m]Imrich[/name_m]
[name_m]Kendrick[/name_m]
[name_u]Lyric[/name_u]
[name_m]Osric[/name_m]
[name_m]Patrick[/name_m]
[name_m]Richmond[/name_m], [name_m]Roderick[/name_m]
[name_m]Tedrick[/name_m], Thadrick
[name_m]Ulric[/name_m]
[name_m]Warrick[/name_m], Wulfric
[name_m]Zerick[/name_m]
If you were into the possibly of a FN/MN combo to make up the “r” and “ick/itch” sounds, perhaps some of these examples would spark an idea…
[name_u]Remington[/name_u] [name_m]Isaac[/name_m]
[name_u]Reed[/name_u] [name_m]Mitchell[/name_m]
[name_m]Ryder[/name_m] [name_m]Jackson[/name_m]
[name_m]Romeo[/name_m] [name_u]Mickey[/name_u]
[name_u]Ryan[/name_u] [name_m]Marcus[/name_m]
[name_u]Rex[/name_u] [name_m]Tucker[/name_m]
[name_m]Rupert[/name_m] [name_m]Ichabod[/name_m]
[name_u]Rowan[/name_u] [name_m]Nicholas[/name_m]
I love Emeric. Also [name_m]Patrick[/name_m] and [name_m]Alaric[/name_m].
Thanks! I’d been worried [name_u]Jericho[/name_u] seemed too unusual, but I’m glad to see people liking it!
[name_u]Jericho[/name_u] has always been one I’ve loved! Not sure I’d ever be brave enough to use it, but it would be great to meet a little one!
[name_m]Rico[/name_m]/[name_m]Ricco[/name_m]?
[name_m]Cedric[/name_m] is my favourite from your list. [name_m]Ricardo[/name_m], [name_m]Kendrick[/name_m], [name_m]Patrick[/name_m] and [name_m]Eric[/name_m] could also get you to the nickname [name_m]Rick[/name_m]/[name_u]Ricky[/name_u] (though [name_m]Eric[/name_m] nn [name_u]Ricky[/name_u] doesn’t quite make sense given the nn is longer).
I’d say [name_m]Fredrick[/name_m] nn [name_u]Ricky[/name_u] would be really cute
[name_m]Frederick[/name_m] is the only one I like on your list. Great name! My favourite [name_m]Rick[/name_m] name though is the gorgeous [name_m]Roderick[/name_m].
[name_m]Alaric[/name_m]
[name_m]Aldric[/name_m]
Amalric
[name_m]Cedric[/name_m]
Cyneric
[name_m]Derek[/name_m]
Elric
[name_m]Merrick[/name_m]
[name_m]Patrick[/name_m]
[name_m]Roderick[/name_m]
[name_m]Broderick[/name_m]
[name_m]Arik[/name_m]
[name_m]Erik[/name_m]
[name_m]Henrik[/name_m]
[name_m]Henryk[/name_m]
Nyyrikki
[name_m]Rurik[/name_m]