iHyper

because pcpp Netherlands sucks, I used the german one for price reference
 
look at something like this:
PCPartPicker part list / Price breakdown by merchant Type Item Price CPU AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor €159.90 @ Alternate Motherboard ASRock - B450M PRO4 Micro ATX AM4 Motherboard €76.99 @ Amazon Deutschland Memory G.Skill - Aegis 16 GB (2 x 8 GB) DDR4-3000 Memory €96.89 @ Mindfactory Storage Crucial - MX500 500 GB 2.5" Solid State Drive €69.90 @ Amazon Deutschland Storage Seagate - Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive €68.99 @ Amazon Deutschland Video Card Sapphire - Radeon RX VEGA 64 8 GB NITRO+ Video Card €447.99 @ Mindfactory Case Cooler Master - MasterBox MB511 RGB ATX Mid Tower Case €65.00 Power Supply BitFenix - Formula Gold 550 W 80+ Gold Certified ATX Power Supply €69.90 @ Caseking Monitor ViewSonic - VX2458-mhd 23.6" 1920x1080 144 Hz Monitor €199.90 @ Caseking Keyboard Redragon - K552-R KUMARA Wired Gaming Keyboard €30.00 Mouse Redragon - COBRA M711 Wired Optical Mouse €23.99 @ Amazon Deutschland   Prices include shipping, taxes, rebates, and discounts     Total €1309.45   Generated by PCPartPicker 2019-02-11 21:01 CET+0100    
or step down to something like this
PCPartPicker part list / Price breakdown by merchant Type Item Price CPU AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor €159.90 @ Alternate Motherboard ASRock - B450M PRO4 Micro ATX AM4 Motherboard €76.99 @ Amazon Deutschland Memory G.Skill - Aegis 16 GB (2 x 8 GB) DDR4-3000 Memory €96.89 @ Mindfactory Storage Crucial - MX500 500 GB 2.5" Solid State Drive €69.90 @ Amazon Deutschland Storage Seagate - Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive €68.99 @ Amazon Deutschland Video Card XFX - Radeon RX 580 8 GB GTS Black Edition OC+ Video Card €193.00 @ Amazon Deutschland Case Cooler Master - MasterBox MB511 RGB ATX Mid Tower Case €65.00 Power Supply BitFenix - Formula Gold 550 W 80+ Gold Certified ATX Power Supply €69.90 @ Caseking Monitor ViewSonic - VX2458-mhd 23.6" 1920x1080 144 Hz Monitor €199.90 @ Caseking Keyboard Redragon - K552-R KUMARA Wired Gaming Keyboard €30.00 Mouse Redragon - COBRA M711 Wired Optical Mouse €23.99 @ Amazon Deutschland   Prices include shipping, taxes, rebates, and discounts     Total €1054.46   Generated by PCPartPicker 2019-02-11 21:01 CET+0100    

just get an RTX 2060 if you're ok with spending the $350. Or a 1070Ti. 
 
Either will be able to manage high settings on 1080p 144hz (144 with csgo)

Whats your budget? You should have listed it in the original question.