An example of a minimalistic barchart using ggplot2

minimal_barchart.R

library(tidyverse)
airquality %>%
  group_by(Month) %>%
  summarise(average_temperature = mean(Temp)) %>%
  ggplot(aes(x=Month, y=average_temperature)) +
  geom_bar(stat='identity', position = 'dodge') + 
  geom_text(aes(label=round(average_temperature, 0)), position=position_dodge(width=0.9), vjust=-0.5) + 
  labs(x='Month', y='Average temperature', title='Average temperature per month') + 
  theme_minimal() + 
  theme(plot.background = element_blank(),
        axis.ticks.x = element_blank(),
        axis.ticks.y = element_blank(),
        panel.grid.minor.y = element_blank(),
        panel.grid.minor.x = element_blank(),
        panel.grid.major.x = element_blank(),
        axis.text.y = element_blank())

Output: