There's not many, but of them, "Interstellar Super Doctor" is one of the better ones. Another is "Marshal, please calm down.", but it's not terribly good after the first few chapters.
Here's a list I created of 10 sentinel/guide novels (8 of which are BL). You'll want to skip #2 (Heroic Death System), 4 (BG) , & 5 (GL). The rest should all fit what you're looking for. Enjoy! https://www.novelupdates.com/viewlist/28990/
There is an arch about this (arch 8) in Beloved Husband https://www.novelupdates.com/series/beloved-husband/
Are you looking for a specific novel or are you looking for recommendations? I have some untranslated action/mystery type sentinel guide novels I can recommend if you wish but if you're looking for a particular novel...
I’m looking for both actually. I would actually what novel it is. I mean I interested to know about your recommendations are.
They're gonna be untranslated as there aren't too many translated sentinel guide novels out there but you can MTL these quite easily. The majority of these are predominantly action with a hint of romance. 终极向导[星际] (Ultimate Guide [Interstellar]) by 宝诏 - transmigrated guide x hidden dark sentinel prince, some human experimentation elements 星际修真宗师 (Interstellar Master Cultivator) by 华飞白 - transmigrated guide x his sentinel apprentice, has cultivation elements, more action and less romance 向导是不是重生的 (Is This Guide Reborn or Not?) by 不间不界 - transmigrated guide x reborn dark sentinel villain, switch couple but ML is usually the top 大魔王等待向导的第九年 (Nine Years the Demon Lord Spent Waiting for His Guide) by 杏遥未晚 - reborn guide x dark sentinel villain, elements of human experimentation and zerg 论白月光的黑化/论白月光的逆袭 (Blackening of the White Moonlight / White Moonlight's Counterattack) by 秋凌 - reborn guide x sentinel trying to save their world from impending apocalypse 全职医生[未来] (Full Time Doctor) by 绝世猫痞 - transmigrated guide x immature scene sentinel prince, novel has a prequel set in the same universe hundreds of years ago that is not sentinel x guide called 重生1/2废柴 (Reborn as Half a Loser) 向导他真的不想卷[重生] (This Guide, He Really Doesn’t Wanna Leave) by 狂渚 - strong hidden guide x reborn dark sentinel, many many conspiracies 哨兵不乖 (Disobedient Sentinel) by 晒豆酱 - weak sentinel x strong guide, post apocalyptic, guides in this setting are more like queen bees and sentinels are workers This one isn't really action or suspense but I thought it was really funny so I just threw it in there. 万人迷向导的烦恼 (Troubles of the Dreamboat Guide) by 项绿瓜 - lazy narcoleptic guide x seriously OCD (like Death the Kid levels of OCD) sentinel