My favorite 5e character is my drow Rog 9/Wiz 2/Brd 3, Soveliss Xiloscient. On our Spelljammer, he's the crew's intelligence/security officer, and I've placed a premium on avoiding magical detection with him. My goals are to have a character who can contribute meaningfully to all three pillars of play and who is immune to divinatuon magic 24/7, and with the right items and spells, I'm pretty much undetectable by magical means and have something like a +18 to my Stealth.
- Rogue/Arcane Trickster - good spells, excellent class features, and pretty great damage for a character with only one attack. A familiar for advantage and booming blade keep my damage competitive, and there are so many uses for improved Mage hand. I just got Spell Ambush, so I haven't had a chance to check it out in play yet
- Wizard/Grey Guild ( from Sterling Vermin Adventuring Co) boost to spells, ritual magic, and the class feature that makes people forget details of their interaction with you on a failed Int Save. Plus no spell book needed.
Bard/College of Lore - more proficiencies! More expertise! Magical secrets! I plan on taking the rest of my levels in bard. Charisma is low for my level (16), but between spell ambush and cutting words, I think I can make my spells stick.
Feats: Observant, Skulker
Magic Items: Amulet of Proof Against Location/Detection, Ring of Mind Shielding, Dagger of Warning
I'm also playing a Half-Orc Devotion Paladin in CoS. Very fun, the perfect character for the game, but we've only played a couple of times and I haven't had a chance to test his capabilities yet.