Looks like any Windows 10 office laptop (with a big enough SSD, an i5 or higher processor and 8 GB RAM) is what you're looking for, although 16 GB RAM might be better if the set of applications you run at the same time really need that.
Please read our reviews at https://www.cnet.com/topics/laptops/products/ and tell which one you prefer and why. If you even don't know the screen size and portability you prefer for your work (13" or 15" does make a difference) you still have some work to do. I'd start at USD 700, then go up in price until you reach the price region you need.
Laptop
Email, web browsing, outlook, word, excel.
Microsoft office
No gaming
A lot programs running at the same time.
Fast
I am having a tough time deciding which laptop to buy. Here are the ones I am looking at?
Surface laptop 3
Dell XPS 13
Dell XPS 15
HP Spectre x360
HP EliteBook x360 1030 G4

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