Protagonist: Weak Chef
Isekai: Summoned
Isekai Feel: ★★★★★ (Can't miss it!)
Setting: Fantasy RPG
Plot: Adventure, Slice of Life in Another World
Notes: Food Series
Protagonist: Business Savvy Gourmet Eater
Isekai: Transported
Isekai Feel: ★★★★★ (Can't miss it!)
Setting: Fantasy RPG
Plot: Conspiracy?, Slice of Life in Another World
Notes: Food Series
Protagonist: OP Anti-hero Monster
Isekai: Trapped in a Game
Isekai Feel: ★★★★★ (How can you forget the Isekai bit with those horns?)
Setting: Fantasy RPG
Plot: Castle/Kingdom Defense
Warning: Murder
Notes: Not for the Faint of Heart.
Protagonist: Daughter of the Hero and the Spirit Queen
Isekai: Reincarnated, RPG Game Components
Isekai Feel: ★★★★★ (Can you even get more isekai than this?)
Setting: Fantasy World
Plot: Slice of Life
Protagonist: Anti-hero-ish
Isekai: Reincarnated
Isekai Feel: ★★★★★ (Can't miss it!)
Setting: Fantasy RPG
Plot: Castle/Kingdom Building
Notes: Action series, Highly recommend
Protagonist: OP Anti-hero Monster
Isekai: Reincarnated
Isekai Feel: ★★★★★ (How can you forget the Isekai bit with those horns?)
Setting: Fantasy RPG
Plot: Castle/Kingdom Building
Warning: Harem, Murder, Cannibalism
Notes: Not for the Faint of Heart.
Protagonist: King (More like King Consort)
Isekai: Summoned
Isekai Feel: ★★★★☆ (Interesting premise)
Setting: Fantasy World
Plot: Slice of Life, Castle/Kingdom Development/Defense?
Protagonist: Calculating daddy's girl
Isekai: Reincarnated
Isekai Feel: ★★★★☆ (Interesting premise)
Setting: Fantasy World
Plot: Slice of Life
Protagonist: Righteous Hero
Isekai: Transported
Isekai Feel: ★★★★☆ (Mostly in the mechanics)
Setting: Sci-Fi/Fantasy World
Plot: Save the World
Warning: BL Subtext
Notes: Before Isekai was popularized, but I HIGHLY recommend giving it a try.
Protagonist: King
Isekai: Summoned
Isekai Feel: ★★★★☆ (Won't miss the isekai, but could pass for historical at times too)
Setting: Fantasy RPG
Plot: Castle/Kingdom Development & Defense
Tondemo Skill de Isekai Hourou Meshi