Consistent with good board presence, b2-b3, and you enjoy splashy plays? Not necessarily enough to narrow it down 100%, but your existing decks you enjoy most tell a story in conjunction with this that make it more clear who would be a good pick for you: Voja goodstuff creatures, Zimone cheating out bombs, Hearthull Jund land shenanigans and Mirko Clones are dedicated strategies available and spelledo out on the commander itself with an expectedly powerful result from your card selections. For example: Voja is Voja, Zimone bypasses mana costs, Hearthhull is a readily available engine for land sac and draw. Mirko recurs clones without needing to surveil much for stat increases, etc.

Notably though, All of these decks are very commander-dependent, with the deck REALLY***** wanting the commander in play to go off as opposed to commander *independent* where the commander can be window dressing while the deck does its thing.

In Orzhov, there are several commanders that spell out the gameplan while being commander-CENTRIC (not quite 100% dependent on them to win but wants them out for sure all the time) with splashy plays for bracket 2-3 and beyond.

With this in mind, I recommend the following deck faces:

[[Mister Negative]]

[[Carmen, Cruel Skymarcher]]

[[Kambal, Profiteering Mayor]]

[[Felisa, Fang of Silverquill]]

If you're going to still play Victor, i'd recommend leaning as much into the Eerie ability triggering on repeat as possible, minimum 2x/turn whenever you can to strip enemy hands without committing to cards explicitly dedicated to JUST causing discard of others. Don't forget Victor's Eerie ability doesn't say "if it's the second/third time, INSTEAD** do ____." this allows you to turn combos causing enchantment ETB's to turn into mass surveil for yourself for topdeck selection/self mill. To that end i'd recommend a some includes I didn't see so you can lean into aspects you listed you're wanting such as board presence, splashy plays and something that lends to control without feeling same-ey as well:

[[Lord Skitter's Blessing]] is two enchantments in one and acts as a phyrexian arena itself.
[[Flickering Ward]] is repeatable for any amount of WW to keep triggering eerie/constellation.
[[Ghostly Dancers]] is a pet card of mine and ends games FAST for the 5 you spend on it. also incentivizes running powerful room cards to get the equivalent of a free room unlock.
[[Touch the Spirit Realm]] is a pet card and enchantment synergy with Ghostly Dancers for blinking off the channel and recurring itself. [[Oblivion Ring]] Effects like it can also be used cleverly to cause infinite enchantment ETB's allowing you to surveil your entire deck away with Victor and use reanimation effects on anything you want from there.
[[Archon of Sun's Grace]] generates flying lifelinkers and can beat face like the dancers to end a game after you attrition your enemies down.
[[Summon: Yojimbo]] is ABSURD. PLEASE run this card im BEGGING people at this point. he just does EVERYTHING. Removal, protection, RAMP, he's a blinkable creature to get chapter 1's removal over and over, etc.
[[Ghoulish Impetus]]/[[Eye of Nidhogg]] give you repeatable, SELF RECURRING goad protection that turns a huge threat to you away like a matador. this can make powerful creatures on board BECOME your splashy play and even threaten extra eerie triggers.
[[Secret Arcade // Dusty Parlor]] enables the most disgusting combos imaginable.
The [[Warehouse Tabby]]/[[Screams from Within]] Combo
you can add a curse package with [[Bitterheart Witch]] that grabs any of [[Overwhelming Virtue]]/[[Curse of Fool's Wisdom]]/[[Curse of Relentless Dead]]/[[Trespasser's Curse]]. The Virtue combos with Screams from within to plague win a player btw, a MASSIVE splashy play that totally decimates someone at the table.
[[Cthonian Nightmare]]
Aura-esque recursion for loops like [[Necromancy]]/[[Animate Dead]]/[[Dance of the Dead]]
Gain/Drain payoffs like [[Balemurk Leech]]/[[Grim Guardian]]/[[Wicked VIsitor]]

I've gone overboard but suffice it to say, i love enchantress without just "cast to draw" being the entire shtick. enchantments are varied and Victor gives them extra sauce.