Ok, so 9th level warlock, no Eldritch Blast, still good balance of offense, defense, and out of combat utility. Roger that!
Taking basic human, +1 to all stats, using a 27 pt buy with max 15 on any score to start with gets me:
STR 12, DEX 14, CON 14, INT 9, WIS 14, CHA 16. At 4th and 8th I'll be taking a Feat(Med Armor Prof) and +2 CHA bringing my CHA to 18. Now I am going to incorporate 2 uncommon magic items, which by 9th level I don't think is unreasonable for a character to have. If this is in violation of the rules, please let me know.
"Beta" the Warlock.
Level: 9
AC:19
HP:66
Prof: +4
Invocations: 5
Saves: WIS & CHA
Background: Urchin
Patron: The Fiend
Pact: Blade
STR 12(19*) +2(+4*) * - Gauntlets of Ogre Strength
DEX 14 +2
CON 14 +2
INT 9 -1
WIS 14 +2
CHA 18 +4
Feats: Proficiency - Medium Armor
Skills: Intimidation, Stealth, Religion, Sleight of Hand, Deception, Persuasion
Spells Known: 10 Cantrips Known: 3 * - Patron spell
Spell DC: 16
Spell To-Hit: +8
Cantrips: Mage Hand, Minor Illusion, Poison Spray
1st Level: Burning Hands*, Command*, Hex, Protection vs. Evil/Good
2nd Level: Blindness/Deafness*, Scorching Ray*, Darkness, Suggestion
3rd Level: Fireball*, Stinking Cloud*, Remove Curse, Counterspell, Dispel Magic
4th Level: Fire Shield*, Wall of Fire*, Banishment, Dimension Door
5th Level: Flame Strike*, Hallow*, Hold Monster
*
EDIT NOTE: I originally had Contact Other Plane in the spell list, but forgot it requires an INT save, which at a 9 INT, is a bad idea*
Invocations: Mask of Many Faces, Thirsting Blade, Lifedrinker, Beguiling Influence, Devil's Sight
Fiendish Patron Perks: Dark One's Blessing, Dark One's Own Luck
Equipment: Scimitar, Mithril Half Plate(Uncommon), Gauntlets of Ogre Power(Uncommon), Shield, rando adventuring stuff
Ok, that about sums him up. He's got melee capability, decent AC, in case he loses the magic STR gauntlets his weapon is still finesse and with a 14 DEX he doesn't get too hosed. Gave him the Mithril Armor so he can stealth better, but you can take that away too without costing him too much functionality. He can disguise himself well, has plenty of CHA based skills thanks to
Beguiling Influence in case he needs to scare, lie or persuade someone as the situation demands, minor illusion as that comes in handy now and then. Devil Sight lets him work in dungeons or at night without a telltale light, and also pairs well with his magical darkness ability. Also, decked in half plate, shield and sword the best part is he doesn't even look like a caster for a bit of additional misdirection to would be enemies that don't know better. I could have a lot of fun with this guy.
To the OP, what do you think?